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Setting value to zero at random

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Ulrik Nash
Ulrik Nash 2011-7-9
Hi Everyone,
Suppose I have two vectors
A = [0 2 2 0 1]
and
B = [1 3 4 2 1]
and suppose I apply following code:
val = max(nonzeros(A)); [~,J] = find(A == val); z(1,J) = 0;
Then the result is to change the 3 and the 4 in B to 0.
My problem is simply, that I only wish to change one place in B to 0, and the place actually changed should be chosen completely at random from those max nonzeros.
How could I adjust my code to allow this?
Regards,
Ulrik.

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Paulo Silva
Paulo Silva 2011-7-9
idx=find(max(nonzeros(A))==A);
B(randi([idx(1) idx(end)]))=0

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