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log10.hpp
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1 #ifndef STAN_MATH_FWD_SCAL_FUN_LOG10_HPP
2 #define STAN_MATH_FWD_SCAL_FUN_LOG10_HPP
3
4 #include <stan/math/fwd/core.hpp>
5
6 #include <stan/math/prim/scal/fun/constants.hpp>
7
8 namespace stan {
9
10 namespace math {
11
12 template <typename T>
13 inline
14 fvar<T>
15 log10(const fvar<T>& x) {
16 using std::log;
17 using std::log10;
18 using stan::math::NOT_A_NUMBER;
19 if (x.val_ < 0.0)
20 return fvar<T>(NOT_A_NUMBER, NOT_A_NUMBER);
21 else
22 return fvar<T>(log10(x.val_), x.d_ / (x.val_ * stan::math::LOG_10));
23 }
24 }
25 }
26 #endif
core.hpp
stan::math::fvar::d_
T d_
Definition: fvar.hpp:15
stan::math::NOT_A_NUMBER
const double NOT_A_NUMBER
(Quiet) not-a-number value.
Definition: constants.hpp:56
stan
Definition: log_sum_exp.hpp:8
stan::math::log10
var log10(const var &a)
Return the base 10 log of the specified variable (cmath).
Definition: log10.hpp:54
stan::math::log
fvar< T > log(const fvar< T > &x)
Definition: log.hpp:15
stan::math::LOG_10
const double LOG_10
The natural logarithm of 10, .
Definition: constants.hpp:39
stan::math::log10
fvar< T > log10(const fvar< T > &x)
Definition: log10.hpp:15
stan::math::fvar::val_
T val_
Definition: fvar.hpp:14
constants.hpp
stan::math::fvar
Definition: fvar.hpp:13

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