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PHPExcel_Best_Fit

category PHPExcel
package PHPExcel_Shared_Trend
copyright Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)

 Methods

Define the regression

__construct(float[] $yValues, float[] $xValues, boolean $const) 

Parameters

$yValues

float[]

The set of Y-values for this regression

$xValues

float[]

The set of X-values for this regression

$const

boolean

getBestFitType() 

getBestFitType() 

getCorrelation() 

getCorrelation($dp) 

Parameters

$dp

getCovariance() 

getCovariance($dp) 

Parameters

$dp

getDFResiduals() 

getDFResiduals($dp) 

Parameters

$dp

Return the Equation of the best-fit line

getEquation(int $dp) : string

Parameters

$dp

int

Number of places of decimal precision to display

Returns

string

getError() 

getError() 

getF() 

getF($dp) 

Parameters

$dp

Return the goodness of fit for this regression

getGoodnessOfFit(int $dp) : float

Parameters

$dp

int

Number of places of decimal precision to return

Returns

float

getGoodnessOfFitPercent() 

getGoodnessOfFitPercent($dp) 

Parameters

$dp

Return the Value of X where it intersects Y = 0

getIntersect(int $dp) : string

Parameters

$dp

int

Number of places of decimal precision to display

Returns

string

Return the standard error of the Intersect

getIntersectSE(int $dp) : string

Parameters

$dp

int

Number of places of decimal precision to display

Returns

string

getSSRegression() 

getSSRegression($dp) 

Parameters

$dp

getSSResiduals() 

getSSResiduals($dp) 

Parameters

$dp

Return the Slope of the line

getSlope(int $dp) : string

Parameters

$dp

int

Number of places of decimal precision to display

Returns

string

Return the standard error of the Slope

getSlopeSE(int $dp) : string

Parameters

$dp

int

Number of places of decimal precision to display

Returns

string

Return the standard deviation of the residuals for this regression

getStdevOfResiduals(int $dp) : float

Parameters

$dp

int

Number of places of decimal precision to return

Returns

float

Return the X-Value for a specified value of Y

getValueOfXForY(float $yValue) : float

Parameters

$yValue

float

Y-Value

Returns

floatX-Value

Return the Y-Value for a specified value of X

getValueOfYForX(float $xValue) : float

Parameters

$xValue

float

X-Value

Returns

floatY-Value

Return the original set of X-Values

getXValues() : float[]

Returns

float[]X-Values

getYBestFitValues() 

getYBestFitValues() 

_calculateGoodnessOfFit() 

_calculateGoodnessOfFit($sumX, $sumY, $sumX2, $sumY2, $sumXY, $meanX, $meanY, $const) 

Parameters

$sumX

$sumY

$sumX2

$sumY2

$sumXY

$meanX

$meanY

$const

_leastSquareFit() 

_leastSquareFit($yValues, $xValues, $const) 

Parameters

$yValues

$xValues

$const

 Properties

 

$_DFResiduals 
 

$_F 
 

$_SSRegression 
 

$_SSResiduals 
 

$_Xoffset 
 

$_Yoffset 
 

$_adjustToZero : boolean
 

$_bestFitType : string
 

$_correlation 
 

$_covariance 
 

$_error : boolean
 

$_goodnessOfFit 
 

$_intersect 
 

$_intersectSE 
 

$_slope 
 

$_slopeSE 
 

$_stdevOfResiduals 
 

$_valueCount : int
 

$_xValues : float[]
 

$_yBestFitValues : float[]
 

$_yValues : float[]