擅长:python、mysql、java
<p>我正在创建一个示例矩阵:</p>
<pre><code>import numpy as np
np.random.seed(0)
F = np.random.randint(2,5, size=(3, 4), dtype = 'int32' )
F
</code></pre>
<p><a href="https://i.stack.imgur.com/SAivq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SAivq.png" alt="enter image description here"/></a></p>
<p>查询切割矩阵行:</p>
^{pr2}$
<p><a href="https://i.stack.imgur.com/RYtq5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RYtq5.png" alt="enter image description here"/></a></p>
<p>查询切割矩阵列:</p>
<pre><code>F[:,2]
</code></pre>
<p><a href="https://i.stack.imgur.com/S8doR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S8doR.png" alt="enter image description here"/></a></p>