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replace the elements of a matrix

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pavlos
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

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-2-13
A(A==1)=B
  2 个评论
pavlos
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
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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更多回答（1 个）

Dishant Arora
Dishant Arora 2014-2-13
A(find(A==1))=B;

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