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tanh.hpp
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#ifndef STAN_MATH_REV_SCAL_FUN_TANH_HPP
#define STAN_MATH_REV_SCAL_FUN_TANH_HPP
#include <stan/math/rev/core.hpp>
#include <cmath>
namespace stan {
namespace math {
namespace {
class tanh_vari : public op_v_vari {
public:
explicit tanh_vari(vari* avi) :
op_v_vari(std::tanh(avi->val_), avi) {
}
void chain() {
double cosh = std::cosh(avi_->val_);
avi_->adj_ += adj_ / (cosh * cosh);
}
};
}
inline var tanh(const var& a) {
return var(new tanh_vari(a.vi_));
}
}
}
#endif
core.hpp
stan::math::cosh
fvar< T > cosh(const fvar< T > &x)
Definition: cosh.hpp:13
stan::math::var
Independent (input) and dependent (output) variables for gradients.
Definition: var.hpp:32
stan::math::var::vi_
vari * vi_
Pointer to the implementation of this variable.
Definition: var.hpp:44
stan::math::tanh
fvar< T > tanh(const fvar< T > &x)
Definition: tanh.hpp:14

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