Linear Fitting with GNUPLOT

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Sat Oct 18 19:16:14 2008


FIT:    data read from "/srv/gnuplot/tmp//fit-19955-23841.dat" using 1:2
        #datapoints = 9
        residuals are weighted equally (unit weight)

function used for fitting: a+b*x
fitted parameters initialized with current variable values



Iteration 0
WSSR        : 4.67902           delta(WSSR)/WSSR   : 0
delta(WSSR) : 0                 limit for stopping : 1e-05
lambda	  : 0.70715

initial set of free parameter values

a               = 1
b               = 1

After 6 iterations the fit converged.
final sum of squares of residuals : 0.000299867
rel. change during last iteration : -1.40647e-13

degrees of freedom (ndf) : 7
rms of residuals      (stdfit) = sqrt(WSSR/ndf)      : 0.00654508
variance of residuals (reduced chisquare) = WSSR/ndf : 4.28381e-05

Final set of parameters            Asymptotic Standard Error
=======================            ==========================

a               = 0.00333119       +/- 0.005472     (164.3%)
b               = 29.1614          +/- 0.4933       (1.692%)


correlation matrix of the fit parameters:

               a      b      
a               1.000 
b              -0.917  1.000