Stan Math Library  2.14.0
reverse mode automatic differentiation
calculate_chain.hpp
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1 #ifndef STAN_MATH_REV_SCAL_FUN_CALCULATE_CHAIN_HPP
2 #define STAN_MATH_REV_SCAL_FUN_CALCULATE_CHAIN_HPP
3 
4 #include <valarray>
5 
6 namespace stan {
7  namespace math {
8 
9  inline double calculate_chain(double x, double val) {
10  return std::exp(x - val); // works out to inv_logit(x)
11  }
12 
13  }
14 }
15 #endif
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10
double calculate_chain(double x, double val)

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