Question

Basically I have a <96×659 double> matrix and I want to extract 1st and 2nd column , then 8th and 9th, then 15th and 16th column and so on..
So I want each 2 columns in a step of 6 . I hope I was clear enough. I’m newbie in matlab .
Thanks in advance!

Answer 1

All you really need to do is construct the list of columns you want:

columns = [1:7:size(matrix,2)+1,  2:7:size(matrix,2)+1];
submat = matrix(:, columns);

Keep in mind this will not necessarily return the columns in the order you want. If you want the columns in ascending order, you could substitute

submat = matrix(:, sort(columns));