casacore::Combinatorics Class Reference

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#include <Combinatorics.h>

Static Public Member Functions
static uInt	factorial (const uInt n)
	Get n!
static uInt	choose (const uInt n, const uInt k)
	"n choose k" = n!/(k!(n-k)!) Exception is thrown if k > n.

Static Private Member Functions
static void	fillCache (const uInt n)

Static Private Attributes
static Vector< uInt >	_factorialCache
static volatile uInt	_factorialCacheSize
static std::mutex	theirMutex

Detailed Description

Combinatorics related functions.

Intended use:

Public interface

Review Status

Date Reviewed:

yyyy/mm/dd

Prerequisite

• Vector
• Array

Etymology

self-explanatory

Synopsis

Various factorial and combinatorical functions.

Motivation

Binomial coefficients needed for Images/ImageProfileFitter

Definition at line 66 of file Combinatorics.h.

Member Function Documentation

choose()

static uInt casacore::Combinatorics::choose ( const uInt  n, const uInt  k  )

static

"n choose k" = n!/(k!(n-k)!) Exception is thrown if k > n.

factorial()

static uInt casacore::Combinatorics::factorial ( const uInt  n )

inlinestatic

Get n!

Definition at line 71 of file Combinatorics.h.

References _factorialCache, and fillCache().

fillCache()

static void casacore::Combinatorics::fillCache ( const uInt  n )

staticprivate

Referenced by factorial().

Member Data Documentation

_factorialCache

Vector<uInt> casacore::Combinatorics::_factorialCache

staticprivate

Definition at line 84 of file Combinatorics.h.

Referenced by factorial().

_factorialCacheSize

volatile uInt casacore::Combinatorics::_factorialCacheSize

staticprivate

Definition at line 85 of file Combinatorics.h.

theirMutex

std::mutex casacore::Combinatorics::theirMutex

staticprivate

Definition at line 86 of file Combinatorics.h.

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

• scimath/Mathematics/Combinatorics.h