Vote Course 1 Week 2 Problem 6 - optimize

[jonaslalin]

Hello!

I gave the search engine a go and found a learner with the same broadcast error:

Week 2 assignment

I have solved this problem. I was writing wrongly the equation for updating the term b in optimize function. After correcting it worked. There were no errors. Please do check your code carefully.

Error:

@Sandeep_Kumar_Kalva

ValueError Traceback (most recent call last)
in
----> 1 params, grads, costs = optimize(w, b, X, Y, num_iterations=100, learning_rate=0.009, print_cost=False)
2
3 print ("w = " + str(params[“w”]))
4 print ("b = " + str(params[“b”]))
5 print ("dw = " + str(grads[“dw”]))

in optimize(w, b, X, Y, num_iterations, learning_rate, print_cost)
35 # YOUR CODE STARTS HERE
36
—> 37 grads, cost = propagate(w, b, X, Y)
38 # YOUR CODE ENDS HERE
39

in propagate(w, b, X, Y)
29 # cost = …
30 # YOUR CODE STARTS HERE
—> 31 A = sigmoid(np.dot(w.T, X) + b)
32 cost = -1./m np.sum((Y np.log(A)+(1-Y)*np.log(1-A)))
33 # YOUR CODE ENDS HERE

ValueError: operands could not be broadcast together with shapes (2,3) (2,2)