What exactly does numpy.exp() do?

python numpy statistics exp
bugsyb picture bugsyb · Aug 11, 2015 · Viewed 152.1k times · Source

I'm very confused as to what np.exp() actually does. In the documentation it says that it: "Calculates the exponential of all elements in the input array." I'm confused as to what exactly this means. Could someone give me more information to what it actually does?

Answer

machine yearning picture machine yearning · Aug 11, 2015

The exponential function is e^x where e is a mathematical constant called Euler's number, approximately 2.718281. This value has a close mathematical relationship with pi and the slope of the curve e^x is equal to its value at every point. np.exp() calculates e^x for each value of x in your input array.

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