title: Minimum element from the matrix column
body: <p>I need to find minimum over all elements from the column which has the maximum column sum.
  I do the following things:</p>
  
  <p>Create random matrix</p>
  
  <pre><code>from numpy import *
  a = random.rand(5,4)
  </code></pre>
  
  <p>Then calculate sum of each column and find index of the maximum element</p>
  
  <pre><code>c = a.sum(axis=0)
  d = argmax(c)
  </code></pre>
  
  <p>Then I try to find the minimum number in this column, but I am quite bad with syntax, I know how to find the minimum element in the row with current index.</p>
  
  <pre><code>e = min(a[d])
  </code></pre>
  
  <p>But how can I change it for columns?</p>