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Ch4, page79 formula 4.1 #69

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Mattliao631 opened this issue Jan 19, 2023 · 0 comments
Open

Ch4, page79 formula 4.1 #69

Mattliao631 opened this issue Jan 19, 2023 · 0 comments

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@Mattliao631
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I read the chinese version, the formula (4.1) is

E = (1/2)sigma(yk - tk)^2

and the following program is also

0.5 * np.sum((y-t)**2)

I wonder if the formula is wrong cause mean squared error on the internet is

(1/n)sigma(yk-tk)^2 the coeefficient is 1/n instead of 1/2
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@Mattliao631