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Version 1.9 Build 1556

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fitter.constraint - Function

	Package	utility
	Module	fitting
	Tool	fitter

get missing rank constraint equations

Synopsis
constraint(id)

Arguments

id	in	the id of a sub-tool
		Allowed:	fitter id
		Default:	0

Returns
integer

Description
Obtain the set of orthogonal equations that make the solution of the rank deficient normal equations possible.

Example

- include 'fitting.g'		# use the default fitter
- fit.linear(dfs.functional('hyper',2),0*(1:10)+1,1:5)
				# equations are: x+y=1; x+y=2; ...
- fit.rank()			# there is rank deficiency
1 
- fit.deficiency()
1
- fit.constraint()		# constraint equation used
[-1 1]  
- fit.solution()		# the solution (as expected)
[1.5 1.5]