Hello all,
I am facing the problem with creating activation and cost function. one thing I need know, when implement the activation function I should reshape the array or not. here I posted my code can you resolve it.
{moderator edit - solution code removed}
It is a mistake to add that reshape on the X at all and in particular to do it with hard-wired dimensions. We are trying to write general code here that works for inputs with any (matching) shapes. You’ll notice that they use relatively small dimensions in the individual test cases for the various functions here, but the actual image data we are using has 12288 features, right? So how is 3 x 2 going to work in that case?
The other mistake here is that the operation between w^T and X is a dot product style matrix multiply, not an “elementwise” multiply, which is what you have done. You need to use np.dot there.
Here’s a thread which talks about the notational conventions that Prof Ng uses for matrix multplications.
Also note that in the cost computation, you will get an error because the dimensions don’t match on the dot products there. Here’s a thread which discusses that.
Hello Sir, I fixed the bug in my code. Thank you for your help.