Adding two matrix together

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Cside 2019-10-13

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评论： Star Strider 2019-10-13

Hi, I have 2 matrix, A (1 x 30) and B (1x60). in B, the numbers from cells 1-30 are zeros and I would like to replace A into the first 30 cells of B, having an end result of 1x60 double.

How may I do that?

Thank you!

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Star Strider 2019-10-13

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https://ww2.mathworks.cn/matlabcentral/answers/485033-adding-two-matrix-together#answer_396124

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Try this:

A = rand(1,30);                                     % Create Vector
B = [zeros(1,30) rand(1,30)];                       % Create Vector
B(1:30) = A;                                        % Desired Result

You did not mention testing for the zero values, or if any other elements of ‘B’ were zero.