Linear Fitting with GNUPLOT

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Sat Oct 18 19:14:41 2008


FIT:    data read from "/srv/gnuplot/tmp//fit-19906-25239.dat" using 1:2
        #datapoints = 8
        residuals are weighted equally (unit weight)

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



Iteration 0
WSSR        : 5.14133           delta(WSSR)/WSSR   : 0
delta(WSSR) : 0                 limit for stopping : 1e-05
lambda	  : 0.707279

initial set of free parameter values

a               = 1
b               = 1

After 5 iterations the fit converged.
final sum of squares of residuals : 6.54951e-05
rel. change during last iteration : -1.63862e-06

degrees of freedom (ndf) : 6
rms of residuals      (stdfit) = sqrt(WSSR/ndf)      : 0.00330391
variance of residuals (reduced chisquare) = WSSR/ndf : 1.09159e-05

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

a               = -0.00695678      +/- 0.002638     (37.93%)
b               = 11.7239          +/- 0.1196       (1.02%)


correlation matrix of the fit parameters:

               a      b      
a               1.000 
b              -0.897  1.000