Can anyone explain what this means. "Warning: Matrix is ​​singular to working precision. "

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Relly Syam
Relly Syam 2021-3-27
评论： Relly Syam 2021-3-27

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DGM
DGM 2021-3-27
For the future, post code using the formatting tools available to you. Do not post pictures of code. Nobody can run a picture of code.
The message means that some variable is singular or near-singular. In other words, it is not an invertible matrix.
If said matrix conceptually should be invertible, then you'll have to figure out why it's not.
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John D'Errico
John D'Errico 2021-3-27
While someone might have tried to look at the code to see what the matrix Ek is composed of, there is no way to do so from a picture of code. So this answer says it all. +1

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