Stan Math Library
2.8.0
reverse mode automatic differentiation
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stan
math
rev
scal
fun
calculate_chain.hpp
Go to the documentation of this file.
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#ifndef STAN_MATH_REV_SCAL_FUN_CALCULATE_CHAIN_HPP
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#define STAN_MATH_REV_SCAL_FUN_CALCULATE_CHAIN_HPP
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#include <valarray>
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namespace
stan {
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namespace
math {
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inline
double
calculate_chain
(
const
double
& x,
const
double
& val) {
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return
std::exp
(x - val);
// works out to inv_logit(x)
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}
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}
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}
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#endif
stan::math::calculate_chain
double calculate_chain(const double &x, const double &val)
Definition:
calculate_chain.hpp:8
stan::math::exp
fvar< T > exp(const fvar< T > &x)
Definition:
exp.hpp:10
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