Stan Math Library  2.20.0
reverse mode automatic differentiation
precomp_vv_vari.hpp
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1 #ifndef STAN_MATH_REV_CORE_PRECOMP_VV_VARI_HPP
2 #define STAN_MATH_REV_CORE_PRECOMP_VV_VARI_HPP
3 
6 
7 namespace stan {
8 namespace math {
9 
10 // use for single precomputed partials
11 class precomp_vv_vari : public op_vv_vari {
12  protected:
13  double da_;
14  double db_;
15 
16  public:
17  precomp_vv_vari(double val, vari* avi, vari* bvi, double da, double db)
18  : op_vv_vari(val, avi, bvi), da_(da), db_(db) {}
19  void chain() {
20  avi_->adj_ += adj_ * da_;
21  bvi_->adj_ += adj_ * db_;
22  }
23 };
24 
25 } // namespace math
26 } // namespace stan
27 #endif
The variable implementation base class.
Definition: vari.hpp:30
void chain()
Apply the chain rule to this variable based on the variables on which it depends. ...
precomp_vv_vari(double val, vari *avi, vari *bvi, double da, double db)
double adj_
The adjoint of this variable, which is the partial derivative of this variable with respect to the ro...
Definition: vari.hpp:44

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