Can we get negative mean square error?

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Soumyabrata Bhattacharjee 2022-7-6

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https://ww2.mathworks.cn/matlabcentral/answers/1754360-can-we-get-negative-mean-square-error

评论： Soumyabrata Bhattacharjee 2022-7-12

I am getting negative mean square error, while training a SVM model. What is confusing me is that, squared errors should not be negative, is this any bug or is it something that I am missing?

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the cyclist 2022-7-7

Are you able to post the data, and the model that gave negative MSE? I know that sometimes R^2 can be negative (when constructed in certain ways for an ML model), but I am also surprised to get MSE negative.

Soumyabrata Bhattacharjee 2022-7-12

Book1.zip

Hey Cyclist, thanks a lot for your response. I am using Optimizable SVM, from Statisctcs and Deep Learning Toolbox. I have attached the data file, for your kind perusal. Please let me know if I can provide any more details.

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