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digamma.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_DIGAMMA_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_DIGAMMA_HPP
3
4 #include <stan/math/fwd/core.hpp>
5
6 #include <stan/math/prim/scal/fun/digamma.hpp>
7 #include <stan/math/prim/scal/fun/trigamma.hpp>
8
9 namespace stan {
10 namespace math {
11
12 template <typename T>
13 inline
14 fvar<T>
15 digamma(const fvar<T>& x) {
16 return fvar<T>(digamma(x.val_), x.d_ * trigamma(x.val_));
17 }
18 }
19 }
20 #endif
stan::math::trigamma
T trigamma(T x)
Definition: trigamma.hpp:49
core.hpp
stan::math::fvar::d_
T d_
Definition: fvar.hpp:14
stan
Definition: log_sum_exp.hpp:8
digamma.hpp
stan::math::fvar::val_
T val_
Definition: fvar.hpp:13
trigamma.hpp
stan::math::fvar
Definition: fvar.hpp:12
stan::math::digamma
fvar< T > digamma(const fvar< T > &x)
Definition: digamma.hpp:15

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