W2 A2 | Implementation of Forward and Backward propagation

Course Q&A Deep Learning Specialization Neural Networks and Deep Learning
1

Please help! I am stuck in implementing Forward and Backward propagation in python. I tried implementing the following codes but in vain. I will attach the image below.

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11356×561 41.4 KB

{moderator edit - solution code removed}
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3943×912 39.6 KB

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Hi @Thombson_Chungkham,

A=σ(w^TX+b) is written in Mathematics form. What this means is to call the sigmoid function with the result of the dot product operation of two matrices, w^T and X, that has been added with b.
So in code, it would look like this
A=sigmoid(np.dot(w.T,X)+b)
Where np.dot() is the numpy library function for the dot product operation.

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Hello, Thombson.

Also, please remove the code. It’s against the honor code.

Thanks.