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negative r squared

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AP
AP 2011 年 7 月 7 日
I have fitted the line y=x which passes through origin to a bunch of data by using cftool. I got a negative r squared for the coefficient of determination. Could someone shed light on what that means? I know that y=x is not the best fit but I want to see how much is the determination coefficient if I force the data to be fitted to y=x.
Thanks.

回答 (1 件)

Oleg Komarov
Oleg Komarov 2011 年 7 月 7 日
Regressing through the origin doesn't give the R^2 you expect.

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