FitLine

The FitLine function fits a line to 2 tables containing x values and y values. This method creates a CLsqFit object, providing full access to all aspects of the fit.

Syntax

CLsqFit = FitLine( x[], y[] )

CLsqFit = FitLine( x[], y[], w[] )

where

x[] is a lua table containing the x values.

y[] is a lua table containing the y values (observations).

w[] is an optional lua table containing the weight values.

CLsqFit is a CLsqFit object containing the fit properties and results.

Example

This example fits x and y tables of numbers:

x = { 12.7, 14, 15, 17.6, 18.24 }	-- x data
y = { 24.1, 22.6, 25,4, 23.5, 27.6 }	-- y data
L = FitLine( x, y )	-- Fit the line, return a CLsqFit object
if L:GetStatus() == 0 then	-- if fit was not successful, then...
n = L:GetErrChan()	-- get the error channel
s = L:GetErrMsg(n)	-- get the error message
Exit( Sprintf("Error[%d] %s\n",n,s) )	-- exit the script and list the error message
end
Printf( "Sdev=%lg", L:GetSigmaFit() )	-- list the standard deviation of the fit
	-- do other things with the fit