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@@ -148,7 +148,8 @@ Functions</h2></td></tr>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p><a href="https://en.wikipedia.org/wiki/ADALINE">Adaptive Linear Neuron (ADALINE)</a> implementation </p>
<dl class="section author"><dt>Author</dt><dd><a href="https://github.com/kvedala">Krishna Vedala</a></dd></dl>
<p><img src="https://upload.wikimedia.org/wikipedia/commons/b/be/Adaline_flow_chart.gif" alt="" width="200px" class="inline"/> <a href="https://commons.wikimedia.org/wiki/File:Adaline_flow_chart.gif">source</a> ADALINE is one of the first and simplest single layer artificial neural network. The algorithm essentially implements a linear function </p><p class="formulaDsp">
<p><a href="https://commons.wikimedia.org/wiki/File:Adaline_flow_chart.gif"><img src="https://upload.wikimedia.org/wikipedia/commons/b/be/Adaline_flow_chart.gif" alt="Structure of an ADALINE network. Source: Wikipedia" style="width:200px; float:right;" class="inline"/></a></p>
<p>ADALINE is one of the first and simplest single layer artificial neural network. The algorithm essentially implements a linear function </p><p class="formulaDsp">
\[ f\left(x_0,x_1,x_2,\ldots\right) = \sum_j x_jw_j+\theta \]
</p>
<p> where \(x_j\) are the input features of a sample, \(w_j\) are the coefficients of the linear function and \(\theta\) is a constant. If we know the \(w_j\), then for any given set of features, \(y\) can be computed. Computing the \(w_j\) is a supervised learning algorithm wherein a set of features and their corresponding outputs are given and weights are computed using stochastic gradient descent method. </p>
@@ -179,27 +180,27 @@ Functions</h2></td></tr>
</table>
</div><div class="memdoc">
<p>Main function </p>
<div class="fragment"><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>&#160; {</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/srand.html">std::srand</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/time.html">std::time</a>(<span class="keyword">nullptr</span>)); <span class="comment">// initialize random number generator</span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; <span class="keywordtype">double</span> eta = 0.1; <span class="comment">// default value of eta</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; <span class="keywordflow">if</span> (argc == 2) <span class="comment">// read eta value from commandline argument if present</span></div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; eta = <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/byte/strtof.html">strtof</a>(argv[1], <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; </div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160; <a class="code" href="../../d5/db0/adaline__learning_8cpp.html#a52053d88ea1bcbbed9aca67ab4eeb499">test1</a>(eta);</div>
<div class="fragment"><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>&#160; {</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/srand.html">std::srand</a>(<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/chrono/c/time.html">std::time</a>(<span class="keyword">nullptr</span>)); <span class="comment">// initialize random number generator</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>&#160; </div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>&#160; <span class="keywordtype">double</span> eta = 0.1; <span class="comment">// default value of eta</span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>&#160; <span class="keywordflow">if</span> (argc == 2) <span class="comment">// read eta value from commandline argument if present</span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>&#160; eta = <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/byte/strtof.html">strtof</a>(argv[1], <span class="keyword">nullptr</span>);</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>&#160; </div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Press ENTER to continue...&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a>.get();</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160; </div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160; <a class="code" href="../../d5/db0/adaline__learning_8cpp.html#a379f7488a305f2571f2932b319931f82">test2</a>(eta);</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>&#160; <a class="code" href="../../d5/db0/adaline__learning_8cpp.html#a52053d88ea1bcbbed9aca67ab4eeb499">test1</a>(eta);</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>&#160; </div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Press ENTER to continue...&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a>.get();</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>&#160; </div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Press ENTER to continue...&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a>.get();</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>&#160; </div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160; <a class="code" href="../../d5/db0/adaline__learning_8cpp.html#a992bdf1fdb0b9d414bcf7981d2d87aa9">test3</a>(eta);</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>&#160; <a class="code" href="../../d5/db0/adaline__learning_8cpp.html#a379f7488a305f2571f2932b319931f82">test2</a>(eta);</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>&#160; </div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Press ENTER to continue...&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a>.get();</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>&#160; </div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160; <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160;}</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>&#160; <a class="code" href="../../d5/db0/adaline__learning_8cpp.html#a992bdf1fdb0b9d414bcf7981d2d87aa9">test3</a>(eta);</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>&#160; </div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>&#160; <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>&#160;}</div>
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</table>
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</dl>
<div class="fragment"><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; {</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; <a class="code" href="../../d6/d30/classmachine__learning_1_1adaline.html">adaline</a> ada(2, eta); <span class="comment">// 2 features</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; </div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> N = 10; <span class="comment">// number of sample points</span></div>
<div class="fragment"><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; {</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; <a class="code" href="../../d6/d30/classmachine__learning_1_1adaline.html">adaline</a> ada(2, eta); <span class="comment">// 2 features</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; </div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> X[N] = {{0, 1}, {1, -2}, {2, 3}, {3, -1},</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; {4, 1}, {6, -5}, {-7, -3}, {-8, 5},</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; {-9, 2}, {-10, -15}};</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <span class="keywordtype">int</span> y[] = {1, -1, 1, -1, -1, -1, 1, 1, 1, -1}; <span class="comment">// corresponding y-values</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; </div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;------- Test 1 -------&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model before fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; </div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; ada.fit(X, y);</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model after fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="keywordtype">int</span> predict = ada.predict({5, -3});</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(5,-3): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; assert(predict == -1);</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; predict = ada.predict({5, 8});</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(5,8): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; assert(predict == 1);</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160;}</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> N = 10; <span class="comment">// number of sample points</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; </div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> X[N] = {{0, 1}, {1, -2}, {2, 3}, {3, -1},</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; {4, 1}, {6, -5}, {-7, -3}, {-8, 5},</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; {-9, 2}, {-10, -15}};</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <span class="keywordtype">int</span> y[] = {1, -1, 1, -1, -1, -1, 1, 1, 1, -1}; <span class="comment">// corresponding y-values</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; </div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;------- Test 1 -------&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model before fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; </div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; ada.fit(X, y);</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model after fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; </div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; <span class="keywordtype">int</span> predict = ada.predict({5, -3});</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(5,-3): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; assert(predict == -1);</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; </div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; predict = ada.predict({5, 8});</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(5,8): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; assert(predict == 1);</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160;}</div>
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<div class="fragment"><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; {</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; <a class="code" href="../../d6/d30/classmachine__learning_1_1adaline.html">adaline</a> ada(2, eta); <span class="comment">// 2 features</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> N = 50; <span class="comment">// number of sample points</span></div>
<div class="fragment"><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; {</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; <a class="code" href="../../d6/d30/classmachine__learning_1_1adaline.html">adaline</a> ada(2, eta); <span class="comment">// 2 features</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> X[N];</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; <span class="keywordtype">int</span> Y[N]; <span class="comment">// corresponding y-values</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; </div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; <span class="comment">// generate sample points in the interval</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; <span class="comment">// [-range2/100 , (range2-1)/100]</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; <span class="keywordtype">int</span> range = 500; <span class="comment">// sample points full-range</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; <span class="keywordtype">int</span> range2 = range &gt;&gt; 1; <span class="comment">// sample points half-range</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N; i++) {</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; X[i] = {x0, x1};</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; Y[i] = (x0 + 3. * x1) &gt; -1 ? 1 : -1;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; }</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; </div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;------- Test 2 -------&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model before fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; </div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; ada.fit(X, Y);</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model after fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; </div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; <span class="keywordtype">int</span> N_test_cases = 5;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N_test_cases; i++) {</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; </div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="keywordtype">int</span> predict = ada.predict({x0, x1});</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> N = 50; <span class="comment">// number of sample points</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; </div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> X[N];</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; <span class="keywordtype">int</span> Y[N]; <span class="comment">// corresponding y-values</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; </div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; <span class="comment">// generate sample points in the interval</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; <span class="comment">// [-range2/100 , (range2-1)/100]</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; <span class="keywordtype">int</span> range = 500; <span class="comment">// sample points full-range</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; <span class="keywordtype">int</span> range2 = range &gt;&gt; 1; <span class="comment">// sample points half-range</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N; i++) {</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; X[i] = {x0, x1};</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; Y[i] = (x0 + 3. * x1) &gt; -1 ? 1 : -1;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; }</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;------- Test 2 -------&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model before fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; </div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; ada.fit(X, Y);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model after fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; <span class="keywordtype">int</span> N_test_cases = 5;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N_test_cases; i++) {</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; </div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(&quot;</span> &lt;&lt; x0 &lt;&lt; <span class="stringliteral">&quot;,&quot;</span> &lt;&lt; x1 &lt;&lt; <span class="stringliteral">&quot;): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; <span class="keywordtype">int</span> predict = ada.predict({x0, x1});</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; <span class="keywordtype">int</span> expected_val = (x0 + 3. * x1) &gt; -1 ? 1 : -1;</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; assert(predict == expected_val);</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160;}</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(&quot;</span> &lt;&lt; x0 &lt;&lt; <span class="stringliteral">&quot;,&quot;</span> &lt;&lt; x1 &lt;&lt; <span class="stringliteral">&quot;): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; </div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; <span class="keywordtype">int</span> expected_val = (x0 + 3. * x1) &gt; -1 ? 1 : -1;</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; assert(predict == expected_val);</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; }</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160;}</div>
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</dl>
<div class="fragment"><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160; {</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; <a class="code" href="../../d6/d30/classmachine__learning_1_1adaline.html">adaline</a> ada(6, eta); <span class="comment">// 2 features</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> N = 100; <span class="comment">// number of sample points</span></div>
<div class="fragment"><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; {</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; <a class="code" href="../../d6/d30/classmachine__learning_1_1adaline.html">adaline</a> ada(6, eta); <span class="comment">// 2 features</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; </div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> X[N];</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; <span class="keywordtype">int</span> Y[N]; <span class="comment">// corresponding y-values</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; <span class="comment">// generate sample points in the interval</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; <span class="comment">// [-range2/100 , (range2-1)/100]</span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; <span class="keywordtype">int</span> range = 200; <span class="comment">// sample points full-range</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; <span class="keywordtype">int</span> range2 = range &gt;&gt; 1; <span class="comment">// sample points half-range</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N; i++) {</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; <span class="keywordtype">double</span> x2 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; X[i] = {x0, x1, x2, x0 * x0, x1 * x1, x2 * x2};</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; Y[i] = ((x0 * x0) + (x1 * x1) + (x2 * x2)) &lt;= 1.f ? 1 : -1;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; </div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;------- Test 3 -------&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model before fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; </div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; ada.fit(X, Y);</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model after fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; </div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160; <span class="keywordtype">int</span> N_test_cases = 5;</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N_test_cases; i++) {</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; <span class="keywordtype">double</span> x2 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; </div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; <span class="keywordtype">int</span> predict = ada.predict({x0, x1, x2, x0 * x0, x1 * x1, x2 * x2});</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; <span class="keyword">const</span> <span class="keywordtype">int</span> N = 100; <span class="comment">// number of sample points</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; </div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;double&gt;</a> X[N];</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; <span class="keywordtype">int</span> Y[N]; <span class="comment">// corresponding y-values</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; </div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; <span class="comment">// generate sample points in the interval</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; <span class="comment">// [-range2/100 , (range2-1)/100]</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; <span class="keywordtype">int</span> range = 200; <span class="comment">// sample points full-range</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="keywordtype">int</span> range2 = range &gt;&gt; 1; <span class="comment">// sample points half-range</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N; i++) {</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; <span class="keywordtype">double</span> x2 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; X[i] = {x0, x1, x2, x0 * x0, x1 * x1, x2 * x2};</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; Y[i] = ((x0 * x0) + (x1 * x1) + (x2 * x2)) &lt;= 1.f ? 1 : -1;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; }</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160; </div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;------- Test 3 -------&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model before fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>&#160; </div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>&#160; ada.fit(X, Y);</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Model after fit: &quot;</span> &lt;&lt; ada &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>&#160; </div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>&#160; <span class="keywordtype">int</span> N_test_cases = 5;</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; N_test_cases; i++) {</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>&#160; <span class="keywordtype">double</span> x0 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>&#160; <span class="keywordtype">double</span> x1 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>&#160; <span class="keywordtype">double</span> x2 = ((<a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/numeric/random/rand.html">std::rand</a>() % range) - range2) / 100.f;</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>&#160; </div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(&quot;</span> &lt;&lt; x0 &lt;&lt; <span class="stringliteral">&quot;,&quot;</span> &lt;&lt; x1 &lt;&lt; <span class="stringliteral">&quot;,&quot;</span> &lt;&lt; x2</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; &lt;&lt; <span class="stringliteral">&quot;): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; </div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; <span class="keywordtype">int</span> expected_val = ((x0 * x0) + (x1 * x1) + (x2 * x2)) &lt;= 1.f ? 1 : -1;</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; assert(predict == expected_val);</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; }</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160;}</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>&#160; <span class="keywordtype">int</span> predict = ada.predict({x0, x1, x2, x0 * x0, x1 * x1, x2 * x2});</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>&#160; </div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot;Predict for x=(&quot;</span> &lt;&lt; x0 &lt;&lt; <span class="stringliteral">&quot;,&quot;</span> &lt;&lt; x1 &lt;&lt; <span class="stringliteral">&quot;,&quot;</span> &lt;&lt; x2</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>&#160; &lt;&lt; <span class="stringliteral">&quot;): &quot;</span> &lt;&lt; predict;</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>&#160; </div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>&#160; <span class="keywordtype">int</span> expected_val = ((x0 * x0) + (x1 * x1) + (x2 * x2)) &lt;= 1.f ? 1 : -1;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>&#160; assert(predict == expected_val);</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>&#160; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> &lt;&lt; <span class="stringliteral">&quot; ...passed&quot;</span> &lt;&lt; <a class="codeRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>&#160; }</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>&#160;}</div>
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<div class="ttc" id="asrand_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/srand.html">std::srand</a></div><div class="ttdeci">T srand(T... args)</div></div>
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<div class="ttc" id="aadaline__learning_8cpp_html_a992bdf1fdb0b9d414bcf7981d2d87aa9"><div class="ttname"><a href="../../d5/db0/adaline__learning_8cpp.html#a992bdf1fdb0b9d414bcf7981d2d87aa9">test3</a></div><div class="ttdeci">void test3(double eta=0.01)</div><div class="ttdef"><b>Definition:</b> adaline_learning.cpp:287</div></div>
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<div class="ttc" id="aadaline__learning_8cpp_html_a992bdf1fdb0b9d414bcf7981d2d87aa9"><div class="ttname"><a href="../../d5/db0/adaline__learning_8cpp.html#a992bdf1fdb0b9d414bcf7981d2d87aa9">test3</a></div><div class="ttdeci">void test3(double eta=0.01)</div><div class="ttdef"><b>Definition:</b> adaline_learning.cpp:289</div></div>
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