On Tuesday, December 13, 2016 5:58 PM, Patrick Dupre <pdupre(a)gmx.com> wrote:
Hello,
How can I call the Faddeeva function in gnuplot ?
I get:
invalid command
Same thing with w_of_z
voigt works fine.
I have gnuplot-5.0.5
and
libcerf1-1.5-0.x86_64
and
libcerf-devel-1.5-0.x86_64
Thank.
===========================================================================
Patrick DUPRÉ | | email: pdupre(a)gmx.com
Laboratoire de Physico-Chimie de l'Atmosphère | |
Université du Littoral-Côte d'Opale | |
Tel. (33)-(0)3 28 23 76 12 | | Fax: 03 28 65 82 44
189A, avenue Maurice Schumann | | 59140 Dunkerque, France
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I am sorry for keyboard error. I meant to post how are you posting the function?
I see in
http://www.gnuplot.info/demo/cerf.html
That the function can be called via:
<quote>
set yrange [-1:1]
set title "Faddeeva/Voigt Function"
set key samplen 0.5
plot real( faddeeva(x) ) lw 2, \
imag( faddeeva(x) ) lw 2, \
real(cdawson(x)) lt -1 lw 0.5 title "Dawson's Integral"
</quote>
I see what you mean now:
[olivares@tricore Downloads]$ gnuplot
G N U P L O T
Version 5.0 patchlevel 5 last modified 2016-10-02
Copyright (C) 1986-1993, 1998, 2004, 2007-2016
Thomas Williams, Colin Kelley and many others
gnuplot home:
http://www.gnuplot.info
faq, bugs, etc: type "help FAQ"
immediate help: type "help" (plot window: hit 'h')
Terminal type set to 'x11'
gnuplot> load 'cerf.2.gnu'
"cerf.2.gnu", line 34: undefined function: faddeeva
That is the error you are getting. Then this has to be a bug! :)
I learned something new today. Thank you very much! I had never heard of the faddeeva
function :) I had heard about Fresnel Integral, Fejer kernel, etc, Gibbs phenomenon, etc.
Gamma and Beta functions.
Best Regards,
Antonio