Stan Math Library  2.14.0
reverse mode automatic differentiation
log1m_inv_logit.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_LOG1M_INV_LOGIT_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_LOG1M_INV_LOGIT_HPP
3 
4 #include <stan/math/fwd/core.hpp>
6 #include <cmath>
7 
8 namespace stan {
9  namespace math {
10 
20  template <typename T>
21  inline fvar<T> log1m_inv_logit(const fvar<T>& x) {
22  using std::exp;
23  return fvar<T>(log1m_inv_logit(x.val_),
24  -x.d_ / (1 + exp(-x.val_)));
25  }
26 
27  }
28 }
29 #endif
fvar< T > log1m_inv_logit(const fvar< T > &x)
Return the natural logarithm of one minus the inverse logit of the specified argument.
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10

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