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There seems to be a bug in the the backpropagation algorithm in the NN folder. the bug is in calculating the deltas, and the derivative of the activation function in the output layer : (lines 7-12)
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http://www.reddit.com/r/MachineLearning/comments/2fxi6v/ama_michael_i_jordan/ckdqtpe
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Hi. I'm using your CNN code. I understood how the backpropagation algorithm work for traditional NN, but I have some problem with the CNN. In particular I don't understand how the errors are back prop…
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I'd like to propose using source code transformation instead of operator overloading. Operator overloading is slow in general and not really optimized in Julia; the compiler doesn't seem to optimize a…