How to change particular element of a matrix by comparing with a scalar value?

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suchismita
suchismita 2014-7-7
评论： suchismita 2014-7-7
i have a code and its not working:
a=rand(4,10);
b=round(a);
y=[1 3];
%only the y rows of a will be checking for condition
beta1=0.30;
if a<=beta1 %beta1 is less than equal a, b will change if its 1 will become 0 and viceversa
b(y,:)=~b(y,:);
end
its not happening...plz plz help me out...

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采纳的回答

Andrei Bobrov
Andrei Bobrov 2014-7-7
try
a=rand(4,10);
b=round(a);
y=[1 3];
beta1=0.30;
c = b(y,:)
t = a(y,:) <= beta1;
c(t) = ~c(t);
b(y,:) = c;

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