math.h File Reference

Copyright 2015-2023 by XGBoost Contributors. More...

#include <xgboost/base.h>
#include <algorithm>
#include <cmath>
#include <limits>
#include <type_traits>
#include <utility>

Go to the source code of this file.

Namespaces
namespace	xgboost
	namespace of xgboost
namespace	xgboost::common
	Copyright 2017-2023, XGBoost Contributors.

Functions
template<typename T >
XGBOOST_DEVICE T	xgboost::common::Sqr (T const &w)
XGBOOST_DEVICE float	xgboost::common::Sigmoid (float x)
	calculate the sigmoid of the input.
XGBOOST_DEVICE double	xgboost::common::Sigmoid (double x)
template<typename T , typename U >
XGBOOST_DEVICE constexpr bool	xgboost::common::CloseTo (T a, U b)
	Equality test for both integer and floating point.
template<typename Iterator >
XGBOOST_DEVICE void	xgboost::common::Softmax (Iterator start, Iterator end)
	Do inplace softmax transformaton on start to end.
template<typename Iterator >
XGBOOST_DEVICE Iterator	xgboost::common::FindMaxIndex (Iterator begin, Iterator end)
	Find the maximum iterator within the iterators.
float	xgboost::common::LogSum (float x, float y)
	perform numerically safe logsum
template<typename Iterator >
float	xgboost::common::LogSum (Iterator begin, Iterator end)
	perform numerically safe logsum
template<typename T >
XGBOOST_DEVICE std::enable_if< std::numeric_limits< T >::is_integer, bool >::type	xgboost::common::CheckNAN (T)
XGBOOST_DEVICE bool	xgboost::common::CheckNAN (float x)
bool	xgboost::common::CheckNAN (double v)
template<typename T >
XGBOOST_DEVICE T	xgboost::common::LogGamma (T v)

Detailed Description

Copyright 2015-2023 by XGBoost Contributors.

additional math utils

Author

Tianqi Chen