Documentation

BesselI
in package
uses ArrayEnabled

Table of Contents

Properties

$arrayArgumentHelper  : ArrayArgumentHelper
$initializationNeeded  : bool

Methods

BESSELI()  : array<string|int, mixed>|float|string
BESSELI.
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.
besselI0()  : float
besselI1()  : float
besselI2()  : float
calculate()  : float
initialiseHelper()  : void
testFalse()  : bool

Properties

$initializationNeeded

private static bool $initializationNeeded = true

Methods

BESSELI()

BESSELI.

public static BESSELI(mixed $x, mixed $ord) : array<string|int, mixed>|float|string

Returns the modified Bessel function In(x), which is equivalent to the Bessel function evaluated for purely imaginary arguments

Excel Function: BESSELI(x,ord)

NOTE: The MS Excel implementation of the BESSELI function is still not accurate. This code provides a more accurate calculation

Parameters
$x : mixed

A float value at which to evaluate the function. If x is nonnumeric, BESSELI returns the #VALUE! error value. Or can be an array of values

$ord : mixed

The integer order of the Bessel function. If ord is not an integer, it is truncated. If $ord is nonnumeric, BESSELI returns the #VALUE! error value. If $ord < 0, BESSELI returns the #NUM! error value. Or can be an array of values

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

Result, or a string containing an error If an array of numbers is passed as an argument, then the returned result will also be an array with the same dimensions

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>

besselI0()

private static besselI0(float $x) : float
Parameters
$x : float
Return values
float

besselI1()

private static besselI1(float $x) : float
Parameters
$x : float
Return values
float

besselI2()

private static besselI2(float $x, int $ord) : float
Parameters
$x : float
$ord : int
Return values
float

calculate()

private static calculate(float $x, int $ord) : float
Parameters
$x : float
$ord : int
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+

testFalse()

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

        

        
    




    

    

                                

                

                                
    

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