1 #ifndef STAN_MATH_PRIM_SCAL_PROB_EXPONENTIAL_CCDF_LOG_HPP
2 #define STAN_MATH_PRIM_SCAL_PROB_EXPONENTIAL_CCDF_LOG_HPP
4 #include <boost/random/exponential_distribution.hpp>
5 #include <boost/random/variate_generator.hpp>
25 template <
typename T_y,
typename T_inv_scale>
26 typename return_type<T_y, T_inv_scale>::type
31 static const char*
function(
"stan::math::exponential_ccdf_log");
36 using boost::math::tools::promote_args;
39 T_partials_return ccdf_log(0.0);
50 operands_and_partials(y, beta);
55 for (
size_t n = 0; n < N; n++) {
56 const T_partials_return beta_dbl =
value_of(beta_vec[n]);
57 const T_partials_return y_dbl =
value_of(y_vec[n]);
59 ccdf_log += -beta_dbl * y_dbl;
63 operands_and_partials.
d_x1[n] -= beta_dbl;
65 operands_and_partials.
d_x2[n] -= y_dbl;
67 return operands_and_partials.
value(ccdf_log);
VectorView< T_return_type, false, true > d_x2
bool check_not_nan(const char *function, const char *name, const T_y &y)
Return true if y is not NaN.
T value_of(const fvar< T > &v)
Return the value of the specified variable.
return_type< T_y, T_inv_scale >::type exponential_ccdf_log(const T_y &y, const T_inv_scale &beta)
T_return_type value(double value)
Returns a T_return_type with the value specified with the partial derivatves.
size_t length(const std::vector< T > &x)
Metaprogram to determine if a type has a base scalar type that can be assigned to type double...
This class builds partial derivatives with respect to a set of operands.
size_t max_size(const T1 &x1, const T2 &x2)
bool check_nonnegative(const char *function, const char *name, const T_y &y)
Return true if y is non-negative.
VectorView is a template expression that is constructed with a container or scalar, which it then allows to be used as an array using operator[].
boost::math::tools::promote_args< typename partials_type< typename scalar_type< T1 >::type >::type, typename partials_type< typename scalar_type< T2 >::type >::type, typename partials_type< typename scalar_type< T3 >::type >::type, typename partials_type< typename scalar_type< T4 >::type >::type, typename partials_type< typename scalar_type< T5 >::type >::type, typename partials_type< typename scalar_type< T6 >::type >::type >::type type
bool check_positive_finite(const char *function, const char *name, const T_y &y)
Return true if y is positive and finite.
VectorView< T_return_type, false, true > d_x1