How do I vectorize this for loop?

y_vec=zeros(100,10);
% y_vec is initially a zeros matrix. y is a vector of dimension 100 x 1 containing values between 1 and 10. For the value
% at ith row in vector y, y_vec(i,value)=1
for i=1:100
    y_vec(i,y(i))=1;
end

Answer 1

[Rik]

You will need to convert to linear indices with sub2ind.