Re: [ferret_users] Embed Ferret in Fortran program

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi -
You can pass arguments to Ferret when you're running it with -script, 
for instance,

   ferret -nojnl -script plot.jnl 5

Then plot.jnl needs to get that argument, and use it in the commands. In 
the script, argument 1 is $1, as follows,


   !----Begin plot.jnl------------------------------------
     use "coads_climatology"
     fill/k=1/l=$1 sst

When running Ferret from your fortran program, this might require 
writing the ferret call to a string variable, so that you can write the 
value of istep to that string. I have not tested this but there must be 
a way to send that string into the CALL SYSTEM command.


Ansley


Haoguo Hu wrote:
> Dear Ferret-eers,
>
> I try to embed Ferret in Fortran program when debugging, here is an 
> example:
>
> !----Begin Fortran program----------------------------
>         program main  !Fortran call Ferret
>     integer istep
>            do istep = 1,5
>          !----------
>              call system("ferret -nojnl -script plot.jnl")
>            enddo
>         end
> !----End Fortran program-------------------------------
>
>
> plot.jnl
> !----Begin plot.jnl------------------------------------
>   use "coads_climatology"
>   fill/k=1/l=1 sst
>   spawn sleep 10s  !pause for viewing and changing the L=2,3,..
> !----End plot.jnl--------------------------------------
>
> I can change the "L=1,2,3,.." in plot.jnl manually.
> The questions are:
> 1. How to make "L=istep" happen automatically?
> 2. How to let the Ferret window open only once and the plotting keep 
> going with "istep"?
>
>
> Thanks
>
>
> HH