selection of particular rows from a matrix?

I would like to select rows from a matrix in a particular pattern as: row nos 1,2,3,5,6,7,9,10,11,13 and so on. Please help me in coding the loop.

Answer 1

[michio]

ismember function could do the work with 'rows' option.

ismember: Array elements that are members of set array

Please check the example code with 'rows' option on the doc page.

[michio]

Very simple sample code follows.

A = [1,2,3; 2,3,1; 3,1,2];
B = [2,3,1];
idx = ismember(A,B,'rows')
A(idx,:)