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Code Issues Projects Releases Wiki Activity

2020-10-19 21:08:55

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2020-10-19 21:08:55 +08:00
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@@ -4,7 +4,7 @@
In [1]:
```
```py
import numpy as np
a = np.array([[1,2,4],
[2,5,3],
@@ -16,7 +16,7 @@ A
Out[1]:
```
```py
matrix([[1, 2, 4],
[2, 5, 3],
[7, 8, 9]])
@@ -26,7 +26,7 @@ matrix([[1, 2, 4],
In [2]:
```
```py
A = np.mat('1,2,4;2,5,3;7,8,9')
A
@@ -34,7 +34,7 @@ A
Out[2]:
```
```py
matrix([[1, 2, 4],
[2, 5, 3],
[7, 8, 9]])
@@ -44,7 +44,7 @@ matrix([[1, 2, 4],
In [3]:
```
```py
a = np.array([[ 1, 2],
[ 3, 4]])
b = np.array([[10,20],
@@ -56,7 +56,7 @@ np.bmat('a,b;b,a')
Out[3]:
```
```py
matrix([[ 1, 2, 10, 20],
[ 3, 4, 30, 40],
[10, 20, 1, 2],
@@ -67,7 +67,7 @@ matrix([[ 1, 2, 10, 20],
In [4]:
```
```py
x = np.array([[1], [2], [3]])
x
@@ -75,7 +75,7 @@ x
Out[4]:
```
```py
array([[1],
[2],
[3]])
@@ -83,14 +83,14 @@ array([[1],
In [5]:
```
```py
A * x
```
Out[5]:
```
```py
matrix([[17],
[21],
[50]])
@@ -100,12 +100,12 @@ matrix([[17],
In [6]:
```
```py
print A * A.I
```
```
```py
[[ 1.00000000e+00 0.00000000e+00 0.00000000e+00]
[ 0.00000000e+00 1.00000000e+00 2.08166817e-17]
[ 2.22044605e-16 -8.32667268e-17 1.00000000e+00]]
@@ -116,12 +116,12 @@ print A * A.I
In [7]:
```
```py
print A ** 4
```
```
```py
[[ 6497 9580 9836]
[ 7138 10561 10818]
[18434 27220 27945]]