Extract rows according to the rows sum

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shane cannon
shane cannon 2017-7-30
编辑： MSP 2017-7-30
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.

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MSP
MSP 2017-7-30
编辑：MSP 2017-7-30
clear all
close all
A = nchoosek(1:9,3)
x=find(sum(A,2)==15)
B=A(x,:)

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