Gamma Function in Python

Question

I'm fairly new to Python but would like to use Euler's Gamma Function in a function I am writing. I'd prefer not to write it as an integral and was wondering if there's something I can import that easily defines the gamma function.

Thanks

Answer 1

Yes, you can. In the module math there are special functions coded such as the Gamma function.

Look at here

Answer 2

我会使用scipy.special.gamma() 。

Answer 3

There is another way:

from mpmath import gamma
print(float(gamma(0.5)))

1.772453850905516

Answer 4

If you want to go deep with Python and other methods I'll recommend that you look at numpy and scipy libraries.

A gamma function can be as easy as

from scipy.stats import gamma
a = 1.99323054838
rv = gamma(a)

That's it, check https://docs.scipy.org/doc/scipy-0.15.1/reference/generated/scipy.stats.gamma.html#scipy.stats.gamma for more info and https://www.scipy.org/ if you want to know more about scientific computing with python.