Class: PHPExcel_Linear_Best_Fit

Source Location: /PHPExcel/Shared/trend/linearBestFitClass.php

Class Overview

PHPExcel_Best_Fit
   |
   --PHPExcel_Linear_Best_Fit

PHPExcel_Linear_Best_Fit

Author(s):

Copyright:

Variables

$_bestFitType

Methods

Inherited Variables

Class: PHPExcel_Best_Fit

PHPExcel_Best_Fit::$_adjustToZero
PHPExcel_Best_Fit::$_correlation
PHPExcel_Best_Fit::$_covariance
PHPExcel_Best_Fit::$_DFResiduals
PHPExcel_Best_Fit::$_error
PHPExcel_Best_Fit::$_F
PHPExcel_Best_Fit::$_goodnessOfFit
PHPExcel_Best_Fit::$_intersect
PHPExcel_Best_Fit::$_intersectSE
PHPExcel_Best_Fit::$_slope
PHPExcel_Best_Fit::$_slopeSE
PHPExcel_Best_Fit::$_SSRegression
PHPExcel_Best_Fit::$_SSResiduals
PHPExcel_Best_Fit::$_stdevOfResiduals
PHPExcel_Best_Fit::$_valueCount
PHPExcel_Best_Fit::$_Xoffset
PHPExcel_Best_Fit::$_xValues
PHPExcel_Best_Fit::$_yBestFitValues
PHPExcel_Best_Fit::$_Yoffset
PHPExcel_Best_Fit::$_yValues

Inherited Methods

Class: PHPExcel_Best_Fit

PHPExcel_Best_Fit::__construct(): Define the regression
PHPExcel_Best_Fit::getBestFitType()
PHPExcel_Best_Fit::getCorrelation()
PHPExcel_Best_Fit::getCovariance()
PHPExcel_Best_Fit::getDFResiduals()
PHPExcel_Best_Fit::getEquation(): Return the Equation of the best-fit line
PHPExcel_Best_Fit::getError()
PHPExcel_Best_Fit::getF()
PHPExcel_Best_Fit::getGoodnessOfFit(): Return the goodness of fit for this regression
PHPExcel_Best_Fit::getGoodnessOfFitPercent()
PHPExcel_Best_Fit::getIntersect(): Return the Value of X where it intersects Y = 0
PHPExcel_Best_Fit::getIntersectSE(): Return the standard error of the Intersect
PHPExcel_Best_Fit::getSlope(): Return the Slope of the line
PHPExcel_Best_Fit::getSlopeSE(): Return the standard error of the Slope
PHPExcel_Best_Fit::getSSRegression()
PHPExcel_Best_Fit::getSSResiduals()
PHPExcel_Best_Fit::getStdevOfResiduals(): Return the standard deviation of the residuals for this regression
PHPExcel_Best_Fit::getValueOfXForY(): Return the X-Value for a specified value of Y
PHPExcel_Best_Fit::getValueOfYForX(): Return the Y-Value for a specified value of X
PHPExcel_Best_Fit::getXValues(): Return the original set of X-Values
PHPExcel_Best_Fit::getYBestFitValues()
PHPExcel_Best_Fit::_calculateGoodnessOfFit()
PHPExcel_Best_Fit::_leastSquareFit()

Class Details

[line 39]
PHPExcel_Linear_Best_Fit

Tags:

copyright:

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Class Variables

$_bestFitType = 'linear'

[line 47]

Algorithm type to use for best-fit (Name of this trend class)

Tags:

access:

protected

Type:	string
Overrides:	Array

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Class Methods

constructor __construct [line 105]

PHPExcel_Linear_Best_Fit __construct(
float[]
$yValues, [float[]
$xValues = array()], [boolean
$const = True])

Define the regression and calculate the goodness of fit for a set of X and Y data values

Overrides PHPExcel_Best_Fit::__construct() (Define the regression)

Parameters:

float[]	$yValues	The set of Y-values for this regression
float[]	$xValues	The set of X-values for this regression
boolean	$const

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method getEquation [line 78]

string getEquation(
[int
$dp = 0])

Return the Equation of the best-fit line

Tags:

access:

public

Overrides PHPExcel_Best_Fit::getEquation() (Return the Equation of the best-fit line)

Parameters:

int

$dp

Number of places of decimal precision to display

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method getValueOfXForY [line 67]

float getValueOfXForY(
float
$yValue)

Return the X-Value for a specified value of Y

Tags:

return:	X-Value
access:	public

Overrides PHPExcel_Best_Fit::getValueOfXForY() (Return the X-Value for a specified value of Y)

Parameters:

float

$yValue

Y-Value

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method getValueOfYForX [line 56]

float getValueOfYForX(
float
$xValue)

Return the Y-Value for a specified value of X

Tags:

return:	Y-Value
access:	public

Overrides PHPExcel_Best_Fit::getValueOfYForX() (Return the Y-Value for a specified value of X)

Parameters:

float

$xValue

X-Value

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Documentation generated on Fri, 12 Oct 2012 00:16:34 +0200 by phpDocumentor 1.4.4