replace the elements of a matrix

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pavlos 2014-2-13

评论： Dishant Arora 2014-2-13

Hello,

Consider a 100x1 matrix, called A, that contains random values of "0" and "1".

The number of "1" is 25 and the rest 75 are "0".

Also, consider a matrix 25x1, called B, that contains random values.

How can I replace the "1" of matrix A with the values of matrix B?

The "0" of A would not be influenced.

Thank you.

Best,

Pavlos

Azzi Abdelmalek 2014-2-13

A(A==1)=B

pavlos 2014-2-13

Thank you for your response.

Unfortunately, the above code do not work.

It works only when A and B have the same dimensions.

In my case, A is 100x1 and B is 25x1.

The number of "1" in A are 25.

Azzi Abdelmalek 2014-2-13

This is not true. Look at this example

%exmple
A=zeros(100,1);
A(randperm(100,25))=1
B=rand(25,1)
%----------------------
A(A==1)=B

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