title: Element-wise median and percentiles of arrays with Numeric Python
body: <p>I am using Numeric Python.  Unfortunately, NumPy is not an option.  If I have multiple arrays, such as:</p>
  
  <pre><code>a=Numeric.array(([1,2,3],[4,5,6],[7,8,9]))
  b=Numeric.array(([9,8,7],[6,5,4],[3,2,1]))
  c=Numeric.array(([5,9,1],[5,4,7],[5,2,3]))
  </code></pre>
  
  <p>How do I return an array that represents the element-wise median of arrays a,b and c?...such as,</p>
  
  <pre><code>array(([5,8,3],[5,5,6],[5,2,3]))
  </code></pre>
  
  <p>And then looking at a more general situation:  Given n number of arrays, how do I find the percentiles of each element?  For example, return an array that represents the 30th percentile of 10 arrays.  Thank you very much for your help!</p>