Re: Is that kind of substitution possible?

[Brouard N. <br...@in...>]

Le vendredi 14 mars 2008 à 17:42 +0100, Juergen Wieferink a écrit :
> Hi,
> 
> >  gnuplot> alpha="3.51e-5"
> >  gnuplot> beta="0.09400"
> >  gnuplot> evie(alpha,beta)= `echo 90.0000  @alpha 0.00000  @beta  0.10000
> > 1|./eviegompertz` gnuplot>print evie(alpha,beta)
> >  4.230246
> >
> > where eviegompertz is a private C program which can't be simulated in
> > gnuplot and just output a value.
> >
> > Now I want to just "splot evie(x,y)" where x and y are variables and not
> > only fixed values. Is it possible to do it? I haven't seen such similar
> > examples. It may be trivial, sorry.
> 
> Just use the system function:
> 
> alpha = 3.51e-5
> beta  = 0.09400
> evie(x, y) \
>   = real(system("echo 90 %f 0 %f 0.1 1|./eviegompertz", x, y))
> print evie(alpha, beta)
> 
> See "help functions system" for details.

Many thanks for your help, but I just got that:
gnuplot> evie(x, y) = real(system("echo 90 %f 0 %f 0.1 1|./eviegompertz", x, y))
gnuplot> print evie(alpha,beta)
sh: 0.09400: command not found

warning:  internal error--stack not empty!
          (function called with too many parameters?)
0.0
gnuplot> help function system
Sorry, no help for 'function style system'
gnuplot> 

I will upgrade from 4.2 to latest 4.3 and will tell you.
Nicolas




> 
> Juergen
> 
> 
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-- 
Brouard Nicolas <br...@in...>