change columns in array to zeros and assign to another vector

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I have a (n,3) array, I need to make the first and second coulmns zeros, and assign the resulted array to a new one
g=(a{1}(:,[1 2])==0);
tried this but not work

Accepted Answer

KSSV on 20 Jun 2020
n = 10 ;
A = rand(n,3) ; % matrix for demo
A(:,1:2) = 0 ; % make first two columns zero
B = A ; % assign tp B

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