| Stan Math Library 2.6.3 probability, sampling & optimization

- Main Page
- Namespaces
- Classes
- Files

- File List
- File Members

All Classes Namespaces Files Functions Variables Typedefs Enumerator Friends Macros
lbeta.hpp
Go to the documentation of this file.
1 #ifndef STAN_MATH_PRIM_SCAL_FUN_LBETA_HPP
2 #define STAN_MATH_PRIM_SCAL_FUN_LBETA_HPP
3
4 #include <boost/math/tools/promotion.hpp>
5
6 #include <boost/math/special_functions/gamma.hpp>
7
8 namespace stan {
9 namespace math {
10
57 template <typename T1, typename T2>
58 inline typename boost::math::tools::promote_args<T1, T2>::type
59 lbeta(const T1 a, const T2 b) {
60 using boost::math::lgamma;
61 return lgamma(a)
62 + lgamma(b)
63 - lgamma(a + b);
64 }
65
66 }
67 }
68
69 #endif
stan::math::lgamma
fvar< T > lgamma(const fvar< T > &x)
Definition: lgamma.hpp:15
stan::math::lbeta
fvar< T > lbeta(const fvar< T > &x1, const fvar< T > &x2)
Definition: lbeta.hpp:16

[ Stan Home Page ] © 2011–2015, Stan Development Team.