Is there a way to do the following without running a for loop.

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Srinivas Gopal Krishna
评论： Srinivas Gopal Krishna 2020-7-31
clear all
y=randi(5,1,5)';
A=zeros(5,5);
for i=1:5,
A(i,y(i))=1;
end
I want to know if this can be implemented without using a for loop.

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采纳的回答

Bruno Luong
Bruno Luong 2020-7-30
编辑：Bruno Luong 2020-7-30
y = randi(5,1,5)'
Then
A = accumarray([(1:5)' y(:)], 1, [5 5]);
or
A = zeros(5,5);
A(sub2ind(size(A),1:5,y'))=1

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