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fdim.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_FDIM_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_FDIM_HPP
3
4 #include <stan/math/fwd/core.hpp>
5 #include <stan/math/prim/scal/fun/fdim.hpp>
6
7 namespace stan {
8 namespace math {
9
10 template <typename T>
11 inline fvar<T> fdim(const fvar<T>& x1, const fvar<T>& x2) {
12 using stan::math::fdim;
13 using std::floor;
14 if (x1.val_ < x2.val_)
15 return fvar<T>(fdim(x1.val_, x2.val_), 0);
16 else
17 return fvar<T>(fdim(x1.val_, x2.val_),
18 x1.d_ - x2.d_ * floor(x1.val_ / x2.val_));
19 }
20
21 template <typename T>
22 inline fvar<T> fdim(const fvar<T>& x1, const double x2) {
23 using stan::math::fdim;
24 using std::floor;
25 if (x1.val_ < x2)
26 return fvar<T>(fdim(x1.val_, x2), 0);
27 else
28 return fvar<T>(fdim(x1.val_, x2), x1.d_);
29 }
30
31 template <typename T>
32 inline fvar<T> fdim(const double x1, const fvar<T>& x2) {
33 using stan::math::fdim;
34 using std::floor;
35 if (x1 < x2.val_)
36 return fvar<T>(fdim(x1, x2.val_), 0);
37 else
38 return fvar<T>(fdim(x1, x2.val_), x2.d_ * -floor(x1 / x2.val_));
39 }
40
41 }
42 }
43 #endif
core.hpp
stan::math::fvar::d_
T d_
Definition: fvar.hpp:15
stan
Definition: log_sum_exp.hpp:8
stan::math::fvar::val_
T val_
Definition: fvar.hpp:14
stan::math::fdim
fvar< T > fdim(const fvar< T > &x1, const fvar< T > &x2)
Definition: fdim.hpp:11
stan::math::floor
fvar< T > floor(const fvar< T > &x)
Definition: floor.hpp:11
stan::math::fvar
Definition: fvar.hpp:13
fdim.hpp

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