CLsqFit:GetWt

CLsqFit:GetWt

The GetWt method returns a table containing the weights for all points in the data sample. If multichannel data are fit, the function returns 1 table for each data channel. The returned table contains CLsqFit:GetNumPts() values. To get the weight of a single point, use GetPtWt.

Syntax

tblWt = CLsqFit:GetWt()

tblWt = CLsqFit:GetWt( nChannel )

tblWt1, tblWt2, tblWt3, tblWt4 = CLsqFit:GetWt()

nChannel is the optional channel to select for multi-channel data.

tblWt is a 1-dimensional array containing the weights assigned all points.

tblWt1, tblWt2, tlWt3, tblWt4 are 1-dimensional array with values that are numbers. of weights assigned to points that have multi-channel (e.g., RGB) values. The number of tables returned equals the number of channels.

Remarks

Two forms are provided with a different number of return values. If the point uses single-channel data (i.e., typical numeric data) or you specify the channel, then a single table is returned. If the point involves multi-channel data, up to 4 tables will be returned. The number of tables returned equals the number of channels of data that were fit.

Example

The following example fitsreturns the number of fit points that had a weight >= 5.0:

L = new_lsqfit()	-- create a CLsqFit object
L:SetNumCoefs( 2 )	-- set 2 coefs to fit a line to single channel data
L:AddPtWt( 3.5, 5.15, 10 )	-- add a point for x = 3.5, obs = 5.15, weight = 10
-- add more points to the fit
L:Fit()	-- Fit the line
nHigh = 0	-- initialize a counter
for k,w in ipairs( L:GetWt() ) do	-- loop over all points k having weight w
if w > 5 then nHigh = nHigh + 1 end	-- w is the k-th weight
end
Printf("Num weights > 5 = %d\n", nHigh )	--list the results

Syntax

Remarks

Example

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