MATLAB: Change columns in array to zeros and assign to another vector

Question

hi

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

Answer 1

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