difference

Difference between np.dot and np.multiply with np.sum in binary cross-entropy loss calculation Question: I have tried the following code but didn’t find the difference between np.dot and np.multiply with np.sum Here is np.dot code logprobs = np.dot(Y, (np.log(A2)).T) + np.dot((1.0-Y),(np.log(1 – A2)).T) print(logprobs.shape) print(logprobs) cost = (-1/m) * logprobs print(cost.shape) print(type(cost)) print(cost) Its output is …

How to calculate time difference by group using pandas? Question: Problem I want to calculate diff by group. And I don’t know how to sort the time column so that each group results are sorted and positive. The original data : In [37]: df Out[37]: id time 0 A 2016-11-25 16:32:17 1 A 2016-11-25 16:36:04 …

What is the difference between size and count in pandas? Question: That is the difference between groupby(“x”).count and groupby(“x”).size in pandas ? Does size just exclude nil ? Asked By: Donovan Thomson || Source Answers: size includes NaN values, count does not: In [46]: df = pd.DataFrame({‘a’:[0,0,1,2,2,2], ‘b’:[1,2,3,4,np.NaN,4], ‘c’:np.random.randn(6)}) df Out[46]: a b c 0 …