What's function does replace LINALG::SUBSTITUTE (A,B,m,n)?

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Roxana Guagnano 2019-1-2

1
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https://ww2.mathworks.cn/matlabcentral/answers/437940-what-s-function-does-replace-linalg-substitute-a-b-m-n

编辑： Stephan 2019-1-3

I'm searching for matlab function which replaces linalg::substitute (A,B,m,n); it allows me replace a part of original matrix A, with a submatrix B, starting from A raw m and A column n.

Thank you.

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Answer 1

Stephan 2019-1-2

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https://ww2.mathworks.cn/matlabcentral/answers/437940-what-s-function-does-replace-linalg-substitute-a-b-m-n#answer_354679

编辑：Stephan 2019-1-3

在 MATLAB Online 中打开

Hi,

you can use this function:

function result = linalg_substitute(A,B,m,n)
    [mA, nA] = size(A);
    [mB, nB] = size(B);
    result = A;
    if mB+m-1 > mA || nB+n-1 > nA %Ignore values out of range
        return
    else
        result(m:mB+m-1, n:nB+n-1) = B;
    end
end

Result is for example:

>> A = zeros(5)
A =
     0     0     0     0     0
     0     0     0     0     0
     0     0     0     0     0
     0     0     0     0     0
     0     0     0     0     0
>> B = ones(3)
B =
     1     1     1
     1     1     1
     1     1     1
>> C = linalg_substitute(A,B,2,2)
C =
     0     0     0     0     0
     0     1     1     1     0
     0     1     1     1     0
     0     1     1     1     0
     0     0     0     0     0