Extract rows according to the rows sum

Hi I have a matrix (A) and I want to extract certain rows that sum to 15. I want to display those rows in another matrix (B). This is my code so far it does not work, please help.

A = nchoosek(1:9,3);

if sum(A,2)==15

disp(B)

end

Thanks.

Answer 1

[MSP]

clear all
close all
A = nchoosek(1:9,3)
x=find(sum(A,2)==15)
B=A(x,:)