Re: Is that kind of substitution possible?

[Juergen W. <wie...@fr...>]

> 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

Aaarg, sorry, there is an sprintf missing:

evie(x, y) = real(system(\
  sprintf("echo 90 %f 0 %f 0.1 1|./eviegompertz", x, y)))

You can even make it more readable:

evie_cmd(x, y) = sprintf("echo 90 %f 0 %f 0.1 1|./eviegompertz", x, 
y)
evie(x, y) = real(system(evie_cmd(x, y)))

> gnuplot> help function system
> Sorry, no help for 'function style system'
> gnuplot>

help functions system

The 's' is crucial here.

Juergen