In the documentation, y is binary (={0, 1}). The Hinge loss presented was the Hinge loss corresponding to a {-1, +1}.
I think the error came from a bad Copy-Paste from Wikipedia (https://en.wikipedia.org/wiki/Hinge_loss) where they use a {-1, +1} notation for classes.
In the original version of the code, you can even notice that Hinge Loss == 1 for y = 0 NO MATTER WHAT yhat is !
bfortuner
commented
3 years ago
In the documentation, y is binary (={0, 1}). The Hinge loss presented was the Hinge loss corresponding to a {-1, +1}. I think the error came from a bad Copy-Paste from Wikipedia (https://en.wikipedia.org/wiki/Hinge_loss) where they use a {-1, +1} notation for classes. In the original version of the code, you can even notice that Hinge Loss == 1 for y = 0 NO MATTER WHAT yhat is !