Hi everyone! There is an error on the page 71 in the book “Programming machine learning from coding to depp learning” P. Perrotta. You can’t just change the weighted sum to a sigmoid without first taking the derivative of the sigmoid. See the explanation there https://yadi.sk/i/T75bWimUYPAe7Q Best…

Hey, Alexandr! Thank you for taking the time to report this, and even take a picture of your notes! I kinda regret not putting that calculation in the book, because from the explanation I wrote, it looks like the derivative of the sigmoid just disappeared. Actually, the formula in the book does tak…

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Programming Machine Learning: Incorrect formula

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nusco 3 November 2020 12:22 4

No problem, Alexandr, and thank you for reporting the issue anyway!

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