mirror of
https://github.com/apachecn/ailearning.git
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2020-10-19 21:08:55
This commit is contained in:
@@ -12,7 +12,7 @@
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In [1]:
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```
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```py
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import numpy as np
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import matplotlib.pyplot as plt
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@@ -39,7 +39,7 @@ import matplotlib.pyplot as plt
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In [2]:
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```
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```py
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%matplotlib inline
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```
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@@ -52,7 +52,7 @@ In [2]:
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In [3]:
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```
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```py
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plt.plot([1,2,3,4])
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plt.ylabel('some numbers')
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@@ -188,14 +188,14 @@ JElHsGOQJB3BjkGSdAQ7BknSEewYJElHsGOQJB3BjkGSdIT/DyxDilXU3HwUAAAAAElFTkSuQmCC
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In [4]:
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```
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```py
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plt.plot([1,2,3,4], [1,4,9,16])
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```
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Out[4]:
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```
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```py
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[<matplotlib.lines.Line2D at 0xa48a550>]
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```
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@@ -328,7 +328,7 @@ SaoBg7kk1YDBXJJqwGAuSTVgMJekGvhf3kAwE/Ra4D0AAAAASUVORK5CYII=
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In [5]:
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```
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```py
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plt.plot([1,2,3,4], [1,4,9,16], 'ro')
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plt.show()
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@@ -414,13 +414,13 @@ DHNJaoBhLkkNMMwlqQGGuSQ14P8AGTGlG2xI8vsAAAAASUVORK5CYII=
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与 **`MATLAB`** 类似,这里可以使用 `axis` 函数指定坐标轴显示的范围:
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```
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```py
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plt.axis([xmin, xmax, ymin, ymax])
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```
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```
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```py
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plt.plot([1,2,3,4], [1,4,9,16], 'ro')
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# 指定 x 轴显示区域为 0-6,y 轴为 0-20
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plt.axis([0,6,0,20])
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@@ -498,7 +498,7 @@ gGQINwAkQ7gBIBnCDQDJEG4ASIZwA0Ay/wc0fnnqj1dLcQAAAABJRU5ErkJggg==
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In [7]:
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```
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```py
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import numpy as np
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import matplotlib.pyplot as plt
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@@ -634,7 +634,7 @@ dEkqCANdkgrCQJekgjDQJakgDHRJKggDXZIK4v8D3/l7N0FXwlcAAAAASUVORK5CYII=
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In [8]:
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```
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```py
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x = np.linspace(-np.pi,np.pi)
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y = np.sin(x)
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@@ -830,7 +830,7 @@ fxeZmr/ZF8WeAAAAAElFTkSuQmCC
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In [9]:
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```
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```py
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# 加逗号 line 中得到的是 line2D 对象,不加逗号得到的是只有一个 line2D 对象的列表
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line, = plt.plot(x, y, 'r-')
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@@ -930,7 +930,7 @@ Jyfj1DY0XlkAAAAASUVORK5CYII=
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In [10]:
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```
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```py
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lines = plt.plot(x, y)
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# 使用键值对
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@@ -1117,12 +1117,12 @@ fxeZmr/ZF8WeAAAAAElFTkSuQmCC
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In [11]:
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```
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```py
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plt.setp(lines)
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```
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```
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```py
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agg_filter: unknown
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alpha: float (0.0 transparent through 1.0 opaque)
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animated: [True | False]
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@@ -1172,7 +1172,7 @@ plt.setp(lines)
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`figure()` 函数会产生一个指定编号为 `num` 的图:
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```
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```py
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plt.figure(num)
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```
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@@ -1180,7 +1180,7 @@ plt.figure(num)
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使用 `subplot` 可以在一副图中生成多个子图,其参数为:
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```
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```py
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plt.subplot(numrows, numcols, fignum)
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```
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@@ -1188,7 +1188,7 @@ plt.subplot(numrows, numcols, fignum)
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In [12]:
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```
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```py
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def f(t):
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return np.exp(-t) * np.cos(2*np.pi*t)
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@@ -1504,7 +1504,7 @@ SXD+P5ePy54P9ccKAAAAAElFTkSuQmCC
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In [13]:
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```
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```py
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mu, sigma = 100, 15
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x = mu + sigma * np.random.randn(10000)
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@@ -1738,7 +1738,7 @@ y8vMzDrCDYqZmXWEGxQzM+sINyhmZtYRblDMzKwj3KCYmVlHuEExM7OOcINiZmYd8f8BVKt7L24G
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In [14]:
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```
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```py
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ax = plt.subplot(111)
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t = np.arange(0.0, 5.0, 0.01)
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