The cost function code return opposite sign

[SendToSpace]

#Take the error when label=1
class1_cost = -labels*np.log(predictions)

#Take the error when label=0
class2_cost = (1-labels)*np.log(1-predictions)

#Take the sum of both costs
cost = class1_cost + class2_cost

In this code, it seem like class1 return positive cost and class2 return negative cost, wouldn't they cancel when added?

[iandanforth]

If the labels can only be 1 or 0, one of the costs will always be 0.

-0 * anything = 0

Or

1-1 * anything = 0

[SendToSpace]

What I mean was, when label is 0,
(1-0)log(1-p) will give negative cost, should be (label-1)log(1-p), for positive cost, or I could be missing a point here

[iandanforth]

@SendToSpace You're correct. The - sign got moved inside the parens in the equation just above the code as well.

[bfortuner]

Nice catch if you have time for a pr that would be awesome!

[Chandu-4444]

Hey @bfortuner, Can I make a PR for this? I'm just a beginner wanted to start contributing ot Open Source.