title: How to combine 5 matrices in c++/opencv
body: <p>I have 5 mxn matrices.. first I converted them to 1 row matrices using the following code:</p>
  
  <pre><code>//now converting to 1 row matrix
  CvMat row_header, *row;
  row = cvReshape(mat, &amp;row_header, 0, 1)
  </code></pre>
  
  <p>is this correct?</p>
  
  <p>then suppose I have 5 such matrices (1 row and 50 columns) how do I combine them into a big matrix (5 rows and 50 columns)?</p>