toolbox::io::sampler_t< PolicyT > Class Template Reference

通用采样器/Generic sampler More...

#include <sampler.hpp>

Public Types
using	index_type = std::size_t
	索引类型/Index type

Public Member Functions
	sampler_t (const sampler_t &other)
	拷贝构造函数/Copy constructor
sampler_t &	operator= (const sampler_t &other)
	拷贝赋值操作符/Copy assignment operator
	sampler_t (std::size_t dataset_size, PolicyT policy=PolicyT {})
	构造函数/Constructor
void	reset ()
	重置索引并重新应用策略/Reset indices and reapply policy
bool	has_next () const noexcept
	是否还有下一个索引/Whether there are more indices
index_type	next ()
	获取下一个索引/Get the next index
std::vector< index_type >	next_batch (std::size_t batch_size)
	获取批量索引/Get a batch of indices

Detailed Description

template<typename PolicyT = sequential_policy_t>
class toolbox::io::sampler_t< PolicyT >

通用采样器/Generic sampler

支持顺序采样和随机采样等策略/Supports sequential and shuffle sampling policies

Template Parameters

PolicyT

采样策略类型/Sampling policy type // 顺序采样/Sequential sampling toolbox::io::sampler_t<> sampler(5); while (sampler.has_next()) { auto idx = sampler.next(); } // 随机采样/Shuffle sampling toolbox::io::sampler_t<toolbox::io::shuffle_policy_t> shuffle_sampler(5, toolbox::io::shuffle_policy_t(123)); shuffle_sampler.reset(); auto batch = shuffle_sampler.next_batch(2);

Member Typedef Documentation

index_type

template<typename PolicyT = sequential_policy_t>

using toolbox::io::sampler_t< PolicyT >::index_type = std::size_t

索引类型/Index type

Constructor & Destructor Documentation

sampler_t() [1/2]

template<typename PolicyT = sequential_policy_t>

toolbox::io::sampler_t< PolicyT >::sampler_t ( const sampler_t< PolicyT > &  other )

inline

拷贝构造函数/Copy constructor

Parameters

other

另一个采样器/Other sampler

sampler_t() [2/2]

template<typename PolicyT = sequential_policy_t>

toolbox::io::sampler_t< PolicyT >::sampler_t ( std::size_t  dataset_size, PolicyT  policy = PolicyT {}  )

inlineexplicit

构造函数/Constructor

Parameters

dataset_size	数据集大小/Dataset size
policy	采样策略/Sampling policy

Member Function Documentation

has_next()

template<typename PolicyT = sequential_policy_t>

bool toolbox::io::sampler_t< PolicyT >::has_next ( ) const

inlinenoexcept

是否还有下一个索引/Whether there are more indices

Returns

如果还有未采样索引则为true/True if there are more indices to sample

while (sampler.has_next()) {
  auto idx = sampler.next();
}

next()

template<typename PolicyT = sequential_policy_t>

index_type toolbox::io::sampler_t< PolicyT >::next ( )

inline

获取下一个索引/Get the next index

Returns

下一个索引/Next index

if (sampler.has_next()) {
  auto idx = sampler.next();
}

next_batch()

template<typename PolicyT = sequential_policy_t>

std::vector< index_type > toolbox::io::sampler_t< PolicyT >::next_batch ( std::size_t  batch_size )

inline

获取批量索引/Get a batch of indices

Parameters

batch_size

批量大小/Batch size

Returns

批量索引数组/Batch of indices

auto batch = sampler.next_batch(4);

operator=()

template<typename PolicyT = sequential_policy_t>

sampler_t & toolbox::io::sampler_t< PolicyT >::operator= ( const sampler_t< PolicyT > &  other )

inline

拷贝赋值操作符/Copy assignment operator

Parameters

other

另一个采样器/Other sampler

Returns

当前采样器引用/Reference to this sampler

reset()

template<typename PolicyT = sequential_policy_t>

void toolbox::io::sampler_t< PolicyT >::reset ( )

inline

重置索引并重新应用策略/Reset indices and reapply policy

重新生成索引并应用采样策略/Regenerates indices and applies sampling policy

sampler_t<> sampler(10);
sampler.reset(); // 重新洗牌/Reshuffle or reorder

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The documentation for this class was generated from the following file:

• src/include/cpp-toolbox/io/dataloader/sampler.hpp