splot xyz zerr

"Patrick Dupre" <[email protected]>
Newsgroups gmane.comp.graphics.gnuplot.user
Message-ID <trinity-197e699a-aea7-4e20-aa83-08a6b077584d-1564349046021@3c-app-mailcom-bs07>
Hello,

I used to use gnuplot for ploting and fitting y (x) function.
I now need to plot and fit 2d functions.
I cannot find the equivalent of 
splot 'file' u 1:2:3:4 w zerr
and
fit function (x,y) file u 1:2:3:4 w zerr
and
fit z=f(x,y) file u 1:2:3:4:5:6 w xyzerr

Is it not possible?

Thank for your help.

===========================================================================
 Patrick DUPRÉ                                 | | email: [email protected]
 Laboratoire interdisciplinaire Carnot de Bourgogne
 9 Avenue Alain Savary, BP 47870, 21078 DIJON Cedex FRANCE
 Tel: +33 (0)380395988
===========================================================================



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