title: Correlating large matrix
body: <p>I have a matrix with 100000 columns (variables) and 100 rows (observation).
  I need to correlate (pearson) all with all.
  I use corrcoef as I found it much faster comparing to corr.
  When I take a matrix of 25000 columns the operation takes 15 seconds. However when I increase the size to 50000 after several minutes my matlab RAM increases to 16Gb and matlab (including windows) begins to freeze. Any suggestions? Any patent for splitting? Calculating column by columns turns as extremely inefficient...</p>
  
  <p>Thanks for help,
  Vadim</p>