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functionfitter.geterror - Function

	Package	utility
	Module	fitting
	Tool	functionfitter

Recover the error of the fitted parameters

Synopsis
geterror()

Returns
Numeric vector or fail

Description

This function returns the standard errors of the unknowns in the fit.

Example

- include 'functionfitter.g'
- ff := functionfitter()
- x := 1:10
- y := 2 + 3*x
- ff.setdata (x, y)
- ff.setfunction ('p0 + p1*x')
- ff.fit(linear=T)                    # Solution perfect like data
[2 3]
- ff.geterror()                       # Errors 0 as data perfect
[0 0] 
-
- include 'randomnumbers.g'           # Add some noise to data
- r := randomnumbers()
- g := r.normal(0,0.1,10)
- y +:= g;
- ff.setdata (x, y)
- ff.fit(linear=T)                    # Now fit and errors non-perfect
[1.96462 2.98964]  
- ff.geterror()
[0.178235 0.0287251]