gamma or log gamma function in C or C

Question

I am seeking a C or C++ version of gamma and log gamma functions.

Are there any code pieces or libraries recommended?

If possible, I want to know the principle of the implementations.

Thank you!!!

Right the first google hits are http://www.johndcook.com/cpp_gamma.html and http://en.wikipedia.org/wiki/Gamma_function — Olaf Dietsche, Mar 18 '13 at 08:59

score 11 · Answer 1 · answered Mar 18 '13 at 08:58

11

In c++11, you can use std::lgamma for log gamma, and tgamma for gamma.

answered Mar 18 '13 at 08:58

BЈовић

I am not able to use c++0x now, but thank you all the same. – kimi Mar 18 '13 at 09:19

score 1 · Answer 2 · answered Mar 18 '13 at 08:59

1

You can try to have a look at Numerical Recipes In C, it should contain the functions you need.

answered Mar 18 '13 at 08:59

Felice Pollano

us2012 · Accepted Answer · 2013-03-18T09:30:58.053

1

edited Mar 18 '13 at 09:30

answered Mar 18 '13 at 09:21

us2012

thank you, these code seem professional enough to use in industry. – kimi Mar 18 '13 at 09:26
@user I'd say they are, but make sure you comply with the license terms when you use them in your software. – us2012 Mar 18 '13 at 09:31
yeap, boost is OK. We have to ignore GNU stuffs. – kimi Mar 18 '13 at 09:56

3 Answers3