| Stan Math Library 2.11.0 reverse mode automatic differentiation

- Main Page
- Modules
- Namespaces
- Classes
- Files

- File List
- File Members

Phi_approx.hpp
Go to the documentation of this file.
1 #ifndef STAN_MATH_PRIM_SCAL_FUN_PHI_APPROX_HPP
2 #define STAN_MATH_PRIM_SCAL_FUN_PHI_APPROX_HPP
3
4 #include <boost/math/tools/promotion.hpp>
5 #include <stan/math/prim/scal/fun/inv_logit.hpp>
6
7 namespace stan {
8 namespace math {
9
21 template <typename T>
22 inline typename boost::math::tools::promote_args<T>::type
23 Phi_approx(T x) {
24 using std::pow;
25 return inv_logit(0.07056 * pow(x, 3.0) + 1.5976 * x);
26 }
27
28 }
29 }
30
31 #endif
stan
Definition: log_sum_exp.hpp:8
stan::math::inv_logit
fvar< T > inv_logit(const fvar< T > &x)
Definition: inv_logit.hpp:15
stan::math::Phi_approx
boost::math::tools::promote_args< T >::type Phi_approx(T x)
Approximation of the unit normal CDF.
Definition: Phi_approx.hpp:23
stan::math::pow
fvar< T > pow(const fvar< T > &x1, const fvar< T > &x2)
Definition: pow.hpp:18
inv_logit.hpp

[ Stan Home Page ] © 2011–2016, Stan Development Team.