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to_fvar.hpp
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1 #ifndef STAN_MATH_FWD_MAT_FUN_TO_FVAR_HPP
2 #define STAN_MATH_FWD_MAT_FUN_TO_FVAR_HPP
3
4 #include <stan/math/prim/mat/fun/Eigen.hpp>
5 #include <stan/math/fwd/core.hpp>
6 #include <stan/math/prim/mat/err/check_matching_dims.hpp>
7 #include <stan/math/prim/scal/meta/is_constant.hpp>
8 #include <boost/utility/enable_if.hpp>
9
10 namespace stan {
11 namespace math {
12
13 template<typename T>
14 inline
15 fvar<T>
16 to_fvar(const T& x) {
17 return fvar<T>(x);
18 }
19
20 template<typename T>
21 inline
22 fvar<T>
23 to_fvar(const fvar<T>& x) {
24 return x;
25 }
26
27
28 template<int R, int C, typename T>
29 inline
30 Eigen::Matrix<T, R, C>
31 to_fvar(const Eigen::Matrix<T, R, C>& m) {
32 return m;
33 }
34
35 template<int R, int C>
36 inline
37 Eigen::Matrix<fvar<double>, R, C>
38 to_fvar(const Eigen::Matrix<double, R, C>& m) {
39 Eigen::Matrix<fvar<double>, R, C> m_fd(m.rows(), m.cols());
40 for (int i = 0; i < m.size(); ++i)
41 m_fd(i) = m(i);
42 return m_fd;
43 }
44
45 template<typename T, int R, int C>
46 inline
47 Eigen::Matrix<fvar<T>, R, C>
48 to_fvar(const Eigen::Matrix<T, R, C>& val,
49 const Eigen::Matrix<T, R, C>& deriv) {
50 stan::math::check_matching_dims("to_fvar",
51 "value", val,
52 "deriv", deriv);
53 Eigen::Matrix<fvar<T>, R, C> ret(val.rows(), val.cols());
54 for (int i = 0; i < val.rows(); i++) {
55 for (int j = 0; j < val.cols(); j++) {
56 ret(i, j).val_ = val(i, j);
57 ret(i, j).d_ = deriv(i, j);
58 }
59 }
60 return ret;
61 }
62 }
63 }
64 #endif
check_matching_dims.hpp
core.hpp
stan::math::to_fvar
fvar< T > to_fvar(const T &x)
Definition: to_fvar.hpp:16
stan::math::check_matching_dims
bool check_matching_dims(const char *function, const char *name1, const Eigen::Matrix< T1, R1, C1 > &y1, const char *name2, const Eigen::Matrix< T2, R2, C2 > &y2)
Return true if the two matrices are of the same size.
Definition: check_matching_dims.hpp:37
Eigen.hpp
stan::math::fvar
Definition: fvar.hpp:13
is_constant.hpp

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