extracting rows in a matrix

[John W. Eaton]

On 13-May-2009, Carlo Rossi wrote:

| this is very cool but actually I need to write something that is good
| for Matlab too; and I notice only now that it doens't work in Matlab

| B = A(randperm (size (A, 1)), :)(1:size (A, 1)/5, :);

Then write it like this:

  tmp = A(randperm (size (A, 1)), :);
  B = tmp(1:size (A, 1)/5, :);

jwe