CLsqFit:GetX

CLsqFit:GetX

The GetX method returns a table containing the value of every point for the n-th basis dimension, starting at 1. If fitting one variable (that is, 1 basis dimension), then you do not need to specify the dimension. The returned table contains CLsqFit:GetNumPts() values.

Syntax

tX = CLsqFit:GetX( nDim* )

tX1, tX2, tX, tWt4 = CLsqFit:GetX()

nDim is the basis dimension to return, starting at 1. If only one dimension is dit, as in fitting the "x" value, then this parameter can be omitted.
tX is a lua table containing the values of all points for the n-th dimension.
tX1, tX2, tX3, etc.are tables of all X values for every basis dimension. The number of tables returned equals the number of dimensions being fit. Each

Examples

The following example shows how to fit a 2x3 polynomial to (x,y,z) data, then makes a scatter plot of the observed values against the y value (dimension 2) :

L = CLsqFit:new()	-- create a CLsqFit object
L:SetNumCoefs( 2, 3 )	-- Fit a 2-D polynomial with 2x3 coefficients
L:AddPt( 3.1, 4.65, 12.5 )	-- add a point for x = 3.2, y = 4.65, z = 12.5
-- (add more points to the fit)
L:Fit()	-- Fit the polynomial
ScatterPlot( L:GetX( 2 ), L:GetObs() )	-- make a scatter plot of observed value against X[2]

Syntax

Examples

Related Topics