Replacing values of a vector with values in another vector of a different size

Question

Erin 2022-9-9

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https://ww2.mathworks.cn/matlabcentral/answers/1801050-replacing-values-of-a-vector-with-values-in-another-vector-of-a-different-size

评论： Erin 2022-9-9

Hello,

Essentially I am trying to create a new matrix C that is the size of A, but replaces the 1s in A with the values in B while keeping everything in the same order. If the value in B is inf, I would like for it to be replaced by a 0.

Here is an example of what I am trying to do (the actual vectors are about 600 elements in length):

A = [ 0 0 0 1 1 1 0 0 1 1 0 0 0 ... ]

B = [ 1 2 3 inf 4 ... ]

C = [ 0 0 0 1 2 3 0 0 0 4 0 0 0 ... ]

Any ideas on how I can accomplish this?

Any help is much appreciated, thanks in advance!

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Answer 1

Stephen23 2022-9-9

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https://ww2.mathworks.cn/matlabcentral/answers/1801050-replacing-values-of-a-vector-with-values-in-another-vector-of-a-different-size#answer_1049225

编辑：Stephen23 2022-9-9

在 MATLAB Online 中打开

A = [0,0,0,1,1,1,0,0,1,1,0,0,0];
B = [1,2,3,inf,4];
C = double(A);
C(A==1) = B;
C(isinf(C)) = 0
C = 1×13
     0     0     0     1     2     3     0     0     0     4     0     0     0