TrendLineLogarithmic(Series,Double,Int32,Int32) Method

Find the best fit for the function f(x) = a + b * ln(x).

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Shared Function TrendLineLogarithmic( _
   ByVal s As Series, _
   ByVal step As Double, _
   ByVal forward As Integer, _
   ByVal backward As Integer _
) As Series

'Usage
 
Dim s As Series
Dim step As Double
Dim forward As Integer
Dim backward As Integer
Dim value As Series
 
value = ForecastEngine.TrendLineLogarithmic(s, step, forward, backward)

public static Series TrendLineLogarithmic( 
   Series s,
   double step,
   int forward,
   int backward
)

Parameters

s: A statistical series.
step: The distance in the x-coordinate between two adjacent extended points. Please note that this also corresponds to the distance in the x-coordinate between the highest and lowest original data point and the first (above or below) additional evaluation point.
forward: The number of additional evaluation points which are evaluated above the x-coordinates of the original given data set.
backward: The number of additional evaluation points which are evaluated below the x-coordinates of the original given data set.

Return Value

A series where the k-th element of the array represents of k-th point (i.e. { x_k, y_k }) of the total set over which the fitted function is evaluated. The total set over which the fitted function is evaluated consists of the `backward' points, original data set points and the `forward' points.

Remark: This methods corresponds in functionality to the method of the same name within Microsoft Excel.

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

ForecastEngine Class
ForecastEngine Members
Overload List