title: Auto-correlation of each column of a matrix in matlab
body: <p>My data is included in a matrix (dim: 900 x 10) called input_data_matrix, each column of this matrix has 900 time-series random signals (light readings integer values).
  I want to compute the relation (or correlation) between these 900 readings of same column independently, (not correlation with the other columns readings), such that I can get 10 correlation result values corresponding to the 10 column which are indicate how much the 900 readings of each column are correlate,<br>
  So, my question is how I can compute this in matlab and what is the best type of correlation to do this.</p>