Dear Nicolas,
running gnuplot, help fit is your friend ;). I could even have said RTFM.=
=20
gnuplot >
gnuplot > help fit
*****
Examples:
f(x) =3D a*x**2 + b*x + c
g(x,y) =3D a*x**2 + b*y**2 + c*x*y
FIT_LIMIT =3D 1e6
fit f(x) 'measured.dat' via 'start.par'
fit f(x) 'measured.dat' using 3:($75) via 'start.par'
fit f(x) './data/trash.dat' using 1:2:3 via a, b, c
fit g(x,y) 'surface.dat' using 1:2:3:(1) via a, b, c
After each iteration step, detailed information about the current state
of the fit is written to the display. The same information about the
initial and final states is written to a log file, "fit.log". This file
is always appended to, so as to not lose any previous fit history; it
should be deleted or renamed as desired. By using the command=20
`set fit logfile`, the name of the log file can be changed.
****
info gnuplot in a shell environment may also help.
Take care
Dieter
Am Sonntag, 25. April 2004 02:00 schrieb Nicolas Busca:
> Hi! First, I'd like to congratulate gnuplot developers for such a
****
=2D=20
=2D

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if you really want to see the pictures above  use some font
with constant spacing like courier! :)
=2D
