Functions to compute statistics from a tatami::Matrix. More...

Namespaces
namespace	counts
	Functions for computing dimension-wise counts.

namespace	grouped_medians
	Functions for computing dimension-wise grouped medians.

namespace	grouped_sums
	Functions for computing dimension-wise grouped sums.

namespace	grouped_variances
	Functions for computing dimension-wise grouped variances.

namespace	medians
	Functions for computing dimension-wise medians.

namespace	ranges
	Functions for computing dimension-wise ranges.

namespace	sums
	Functions for computing dimension-wise sums.

namespace	variances
	Functions for computing dimension-wise variances.

Classes
class	LocalOutputBuffer
	Local output buffer for running calculations. More...

class	LocalOutputBuffers
	Local output buffers for running calculations. More...

Functions
template<typename Group_ >
size_t	total_groups (const Group_ *group, size_t n)

template<typename Group_ , typename Size_ >
std::vector< Size_ >	tabulate_groups (const Group_ *group, Size_ n)

Detailed Description

Functions to compute statistics from a tatami::Matrix.

Function Documentation

template<typename Group_ >

size_t tatami_stats::total_groups	(	const Group_ *	group,
		size_t	n
	)

Count the total number of groups, typically for per-group memory allocations.

Template Parameters

Group_ Integer type for the group assignments.

Parameters

[in]	group	Pointer to an array of group assignments per observation. Each assignment should be an integer in \([0, G)\) where \(G\) is the total number of groups.
	n	Number of observations, i.e., the length of the array referenced by `group`.

Returns: Total number of groups, i.e., \(G\). Note that not all groups may actually have non-zero occurrences in group.

template<typename Group_ , typename Size_ >

std::vector< Size_ > tatami_stats::tabulate_groups	(	const Group_ *	group,
		Size_	n
	)

Count the occurrences of each group.

Template Parameters

Group_	Integer type for the group assignments.
Size_	Integer type for the number of observations.

Parameters

[in]	group	Pointer to an array of group assignments per observation. Each assignment should be an integer in \([0, G)\) where \(G\) is the total number of groups.
	n	Number of observations, i.e., the length of the array referenced by `group`.

Returns: Vector of length equal to \(G\), containing the number of occurrences of each group.