Wrong definition of E in C2_W2_Assignment

Course Q&A Math for Machine Learning Calculus for Machine Learning and Data Science
1

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Define cost function according to the equation (1)(1):

In [24]:

def E(m, b, X, Y):

return 1/(2*len(Y))np.sum(np.dot(mX + b - Y, X))

There shouldn’t be a dot product - that is for the dEdm

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Thanks for reporting this, @toontalk!

@esanina, when you get some time, can you have a look at this? Thanks!

Lucas

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I have been stuck on that line of code from last 1 hour, where did that dot product came from. I think that dot product is there to square the values. But still cant understand why dot with ‘X’.
Was about to go over stackoverflow but decided to check here first.

Please resolve this

4

@toontalk @DietzscheNostoevsky sorry for confusion. It was a mistake in the code. We have fixed it now.

5

Its been updated. Thank you.