Documentation

ChiSquared
in package
Uses ArrayEnabled

Table of Contents

Constants

EPS  = 2.22E-16

Properties

$arrayArgumentHelper  : ArrayArgumentHelper
$initializationNeeded  : bool

Methods

distributionLeftTail()  : array<string|int, mixed>|float|int|string
CHIDIST.
distributionRightTail()  : array<string|int, mixed>|float|int|string
CHIDIST.
inverseLeftTail()  : array<string|int, mixed>|float|string
CHIINV.
inverseRightTail()  : array<string|int, mixed>|float|string
CHIINV.
test()  : float|string
CHITEST.
degrees()  : int
evaluateArrayArguments()  : array<string|int, mixed>
Handles array argument processing when the function accepts multiple arguments, and any of them can be an array argument.
evaluateArrayArgumentsIgnore()  : array<string|int, mixed>
Handles array argument processing when the function accepts multiple arguments, and any of them can be an array argument except for the one specified by ignore.
evaluateArrayArgumentsSubset()  : array<string|int, mixed>
Handles array argument processing when the function accepts multiple arguments, but only the first few (up to limit) can be an array arguments.
evaluateArrayArgumentsSubsetFrom()  : array<string|int, mixed>
Handles array argument processing when the function accepts multiple arguments, but only the last few (from start) can be an array arguments.
evaluateSingleArgumentArray()  : array<string|int, mixed>
Handles array argument processing when the function accepts a single argument that can be an array argument.
gammp()  : float
gcf()  : float
gser()  : float
initialiseHelper()  : void
inverseLeftTailCalculation()  : float
pchisq()  : float
testFalse()  : bool

Constants

Properties

$initializationNeeded

private static bool $initializationNeeded = true

Methods

distributionLeftTail()

CHIDIST.

public static distributionLeftTail(mixed $value, mixed $degrees, mixed $cumulative) : array<string|int, mixed>|float|int|string

Returns the one-tailed probability of the chi-squared distribution.

Parameters
$value : mixed

Float value for which we want the probability Or can be an array of values

$degrees : mixed

Integer degrees of freedom Or can be an array of values

$cumulative : mixed

Boolean value indicating if we want the cdf (true) or the pdf (false) Or can be an array of values

Return values
array<string|int, mixed>|float|int|string

If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

distributionRightTail()

CHIDIST.

public static distributionRightTail(mixed $value, mixed $degrees) : array<string|int, mixed>|float|int|string

Returns the one-tailed probability of the chi-squared distribution.

Parameters
$value : mixed

Float value for which we want the probability Or can be an array of values

$degrees : mixed

Integer degrees of freedom Or can be an array of values

Return values
array<string|int, mixed>|float|int|string

If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

inverseLeftTail()

CHIINV.

public static inverseLeftTail(mixed $probability, mixed $degrees) : array<string|int, mixed>|float|string

Returns the inverse of the left-tailed probability of the chi-squared distribution.

Parameters
$probability : mixed

Float probability at which you want to evaluate the distribution Or can be an array of values

$degrees : mixed

Integer degrees of freedom Or can be an array of values

Return values
array<string|int, mixed>|float|string

If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

inverseRightTail()

CHIINV.

public static inverseRightTail(mixed $probability, mixed $degrees) : array<string|int, mixed>|float|string

Returns the inverse of the right-tailed probability of the chi-squared distribution.

Parameters
$probability : mixed

Float probability at which you want to evaluate the distribution Or can be an array of values

$degrees : mixed

Integer degrees of freedom Or can be an array of values

Return values
array<string|int, mixed>|float|string

If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

test()

CHITEST.

public static test(mixed $actual, mixed $expected) : float|string

Uses the chi-square test to calculate the probability that the differences between two supplied data sets (of observed and expected frequencies), are likely to be simply due to sampling error, or if they are likely to be real.

Parameters
$actual : mixed

an array of observed frequencies

$expected : mixed

an array of expected frequencies

Return values
float|string

degrees()

protected static degrees(int $rows, int $columns) : int
Parameters
$rows : int
$columns : int
Return values
int

evaluateArrayArguments()

Handles array argument processing when the function accepts multiple arguments, and any of them can be an array argument.

protected static evaluateArrayArguments(callable $method, mixed ...$arguments) : array<string|int, mixed>

Example use for: ROUND() or DATE().

Parameters
$method : callable
$arguments : mixed
Return values
array<string|int, mixed>

evaluateArrayArgumentsIgnore()

Handles array argument processing when the function accepts multiple arguments, and any of them can be an array argument except for the one specified by ignore.

protected static evaluateArrayArgumentsIgnore(callable $method, int $ignore, mixed ...$arguments) : array<string|int, mixed>

Example use for: HLOOKUP() and VLOOKUP(), where argument 1 is a matrix that needs to be treated as a database rather than as an array argument.

Parameters
$method : callable
$ignore : int
$arguments : mixed
Return values
array<string|int, mixed>

evaluateArrayArgumentsSubset()

Handles array argument processing when the function accepts multiple arguments, but only the first few (up to limit) can be an array arguments.

protected static evaluateArrayArgumentsSubset(callable $method, int $limit, mixed ...$arguments) : array<string|int, mixed>

Example use for: NETWORKDAYS() or CONCATENATE(), where the last argument is a matrix (or a series of values) that need to be treated as a such rather than as an array arguments.

Parameters
$method : callable
$limit : int
$arguments : mixed
Return values
array<string|int, mixed>

evaluateArrayArgumentsSubsetFrom()

Handles array argument processing when the function accepts multiple arguments, but only the last few (from start) can be an array arguments.

protected static evaluateArrayArgumentsSubsetFrom(callable $method, int $start, mixed ...$arguments) : array<string|int, mixed>

Example use for: Z.TEST() or INDEX(), where the first argument 1 is a matrix that needs to be treated as a dataset rather than as an array argument.

Parameters
$method : callable
$start : int
$arguments : mixed
Return values
array<string|int, mixed>

evaluateSingleArgumentArray()

Handles array argument processing when the function accepts a single argument that can be an array argument.

protected static evaluateSingleArgumentArray(callable $method, array<string|int, mixed> $values) : array<string|int, mixed>

Example use for: DAYOFMONTH() or FACT().

Parameters
$method : callable
$values : array<string|int, mixed>
Return values
array<string|int, mixed>

gammp()

private static gammp(int $n, float $x) : float
Parameters
$n : int
$x : float
Return values
float

gcf()

private static gcf(int $n, float $x) : float
Parameters
$n : int
$x : float
Return values
float

gser()

private static gser(int $n, float $x) : float
Parameters
$n : int
$x : float
Return values
float

initialiseHelper()

private static initialiseHelper(array<string|int, mixed>|false $arguments) : void
Parameters
$arguments : array<string|int, mixed>|false

Can be changed to array for Php8.1+

inverseLeftTailCalculation()

private static inverseLeftTailCalculation(float $probability, int $degrees) : float
Parameters
$probability : float
$degrees : int
Return values
float

pchisq()

private static pchisq(float $chi2, int $degrees) : float
Parameters
$chi2 : float
$degrees : int
Return values
float

testFalse()

private static testFalse(mixed $value) : bool
Parameters
$value : mixed
Return values
bool

        
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