Stan Math Library  2.20.0
reverse mode automatic differentiation
exp.hpp
Go to the documentation of this file.
1 #ifndef STAN_MATH_FWD_SCAL_FUN_EXP_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_EXP_HPP
3 
4 #include <stan/math/fwd/meta.hpp>
5 #include <stan/math/fwd/core.hpp>
6 #include <cmath>
7 
8 namespace stan {
9 namespace math {
10 template <typename T>
11 inline fvar<T> exp(const fvar<T>& x) {
12  using std::exp;
13  return fvar<T>(exp(x.val_), x.d_ * exp(x.val_));
14 }
15 
16 } // namespace math
17 } // namespace stan
18 #endif
T d_
The tangent (derivative) of this variable.
Definition: fvar.hpp:50
var exp(const var &a)
Return the exponentiation of the specified variable (cmath).
Definition: exp.hpp:41
T val_
The value of this variable.
Definition: fvar.hpp:45
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:11
This template class represents scalars used in forward-mode automatic differentiation, which consist of values and directional derivatives of the specified template type.
Definition: fvar.hpp:41

     [ Stan Home Page ] © 2011–2018, Stan Development Team.