Linear Fitting with GNUPLOT

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Sat Oct 18 18:58:17 2008


FIT:    data read from "/srv/gnuplot/tmp//fit-19552-29404.dat" using 1:2
        #datapoints = 11
        residuals are weighted equally (unit weight)

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



Iteration 0
WSSR        : 45.2106           delta(WSSR)/WSSR   : 0
delta(WSSR) : 0                 limit for stopping : 1e-05
lambda	  : 0.71071

initial set of free parameter values

a               = 1
b               = 1

After 5 iterations the fit converged.
final sum of squares of residuals : 0.00115807
rel. change during last iteration : -2.31619e-13

degrees of freedom (ndf) : 9
rms of residuals      (stdfit) = sqrt(WSSR/ndf)      : 0.0113435
variance of residuals (reduced chisquare) = WSSR/ndf : 0.000128675

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

a               = 0.00206349       +/- 0.006395     (309.9%)
b               = 28.6906          +/- 0.06326      (0.2205%)


correlation matrix of the fit parameters:

               a      b      
a               1.000 
b              -0.845  1.000