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reverse mode automatic differentiation
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stan
math
prim
scal
fun
sign.hpp
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#ifndef STAN_MATH_PRIM_SCAL_FUN_SIGN_HPP
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#define STAN_MATH_PRIM_SCAL_FUN_SIGN_HPP
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namespace
stan
{
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namespace
math {
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// returns 1 if NaN is passed in.
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template
<
typename
T>
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inline
int
sign
(
const
T& z) {
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return
(z == 0) ? 0 : z < 0 ? -1 : 1;
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}
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}
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}
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#endif
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stan
Definition:
log_sum_exp.hpp:8
stan::math::sign
int sign(const T &z)
Definition:
sign.hpp:9
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