Stan Math Library  2.14.0
reverse mode automatic differentiation
inv_logit.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_INV_LOGIT_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_INV_LOGIT_HPP
3 
4 #include <stan/math/fwd/core.hpp>
5 
7 
8 namespace stan {
9  namespace math {
10 
19  template <typename T>
20  inline fvar<T> inv_logit(const fvar<T>& x) {
21  using std::exp;
22  using std::pow;
23  return fvar<T>(inv_logit(x.val_),
24  x.d_ * inv_logit(x.val_) * (1 - inv_logit(x.val_)));
25  }
26  }
27 }
28 #endif
fvar< T > inv_logit(const fvar< T > &x)
Returns the inverse logit function applied to the argument.
Definition: inv_logit.hpp:20
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10
fvar< T > pow(const fvar< T > &x1, const fvar< T > &x2)
Definition: pow.hpp:17

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