how to change part of a matrix into zero
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i have a matrix A= (m,n) and i want to make the first 10% row elements 0 suppose A= [1 1 1; 2 2 2; 3 3 5; 4 4 4; 5 5 1; 6 1 3; 1 6 5; 7 7 1; 4 8 2; 5 0 9] will become B= [0 0 0; 2 2 2; 3 3 5; 4 4 4; 5 5 1; 6 1 3; 1 6 5; 7 7 1; 4 8 2; 5 0 9]
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Andrei Bobrov
le 7 Déc 2013
n = round(numel(A)*.1);
B = A';
B(1:n) = 0;
B = B';
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djibeyrou ba
le 21 Mai 2020
a=4;
b=3;
A=zeros(a,b);
B=size(A)
if a== b
B=A==-1;
else
B=A==0;
end
disp(B)
I need help with this code i want to change some value in the matrix
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