Why Does eig() Not Throw an Error for Non-Square, Symbolic Input?

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Paul 2021-5-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/834613-why-does-eig-not-throw-an-error-for-non-square-symbolic-input

评论： Paul 2022-5-25

采纳的回答： Arthi Sathyamurthi

在 MATLAB Online 中打开

Example:

M = [sym(zeros(2));sym('m',[2 2])];

M(1,1) = 1

M =

eig(M)

ans =

But filling in the top partition of M does yield the expected result:

M(1:2,1:2) = sym('n',[2 2])

M =

eig(M)

Error using sym/eig (line 51)
Matrix must be square.

Bug?

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Christine Tobler 2021-5-20

That does seem wrong, I'll pass it along to the right team.

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采纳的回答

Arthi Sathyamurthi 2021-5-28

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/834613-why-does-eig-not-throw-an-error-for-non-square-symbolic-input#answer_711190

This bug has been fixed and the updates will be available in the future release.

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Paul 2021-5-28

Link to bug report?

Paul 2022-5-25

在 MATLAB Online 中打开

Fixed in 2022a

M = [sym(zeros(2));sym('m',[2 2])];

M(1,1) = 1

M =

eig(M)

Error using sym/eig
Matrix must be square.

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Mathematics and Optimization Symbolic Math Toolbox

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