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2.12.0
reverse mode automatic differentiation
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stan
math
fwd
scal
fun
abs.hpp
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#ifndef STAN_MATH_FWD_SCAL_FUN_ABS_HPP
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#define STAN_MATH_FWD_SCAL_FUN_ABS_HPP
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#include <
stan/math/fwd/core.hpp
>
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#include <
stan/math/fwd/scal/fun/value_of.hpp
>
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#include <
stan/math/prim/scal/fun/constants.hpp
>
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#include <
stan/math/prim/scal/fun/abs.hpp
>
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#include <
stan/math/prim/scal/fun/value_of.hpp
>
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#include <
stan/math/prim/scal/meta/likely.hpp
>
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namespace
stan
{
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namespace
math {
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template
<
typename
T>
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inline
fvar<T>
abs
(
const
fvar<T>
& x) {
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if
(x.
val_
> 0.0)
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return
x;
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else
if
(x.
val_
< 0.0)
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return
fvar<T>
(-x.
val_
, -x.
d_
);
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else
if
(x.
val_
== 0.0)
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return
fvar<T>
(0, 0);
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else
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return
fvar<T>
(
abs
(x.
val_
),
NOT_A_NUMBER
);
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}
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}
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}
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#endif
stan::math::abs
fvar< T > abs(const fvar< T > &x)
Definition:
abs.hpp:15
core.hpp
stan::math::fvar::d_
T d_
Definition:
fvar.hpp:14
stan::math::NOT_A_NUMBER
const double NOT_A_NUMBER
(Quiet) not-a-number value.
Definition:
constants.hpp:55
stan
Definition:
log_sum_exp.hpp:8
value_of.hpp
abs.hpp
stan::math::fvar::val_
T val_
Definition:
fvar.hpp:13
likely.hpp
constants.hpp
value_of.hpp
stan::math::fvar
Definition:
fvar.hpp:12
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