title: Extracting lower Triangular matrix without considering diagonal element
body: <p>I have a 5x5 matrix </p>
  
  <pre><code>A = 
     [0    0    0    0    1; 
      0.36 0    0    0    1; 
      0    0.25 0    0    1; 
      0.35 0    0    0    1;
      0    0    0.28 0    1]; 
  </code></pre>
  
  <p>I want to extract lower triangular elements of the matrix without considering the diagonal elements. Therefore, resulting matrix should be</p>
  
  <pre><code>C = [0.36 0 0.35 0 0.25 0 0 0 0.28 0]
  </code></pre>
  
  <p>Let me know how I can get this. </p>