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List:       gnuplot-info
Subject:    Re: Plotting online
From:       dirk caspary <dcaspar () gwdg ! de>
Date:       2003-05-15 8:15:20
[Download RAW message or body]

Hello,
>
> Dear Colleague,
>
> I would like to see Gnuplot working in an "watch file" mode.
> For example, say, my Fortran code is generating a 2-column data file
> and as it does so I like to have my Gnuplot go on plotting the
> results automatically.

I'm not familiar with FORTRAN, but on a Linux system the C solution
looks like (was posted a long time ago)

int main()
{
        FILE *fp;
        fp = popen("gnuplot","w");

        /* Plot x*x */
        fprintf(fp,"plot x*x\n");
        fflush(fp);

        fprintf(stderr,"\nPress <ENTER> to exit....\n");
        getchar();

        /* Send postscript output to file outfile.ps */
        fprintf(fp,"set output \"outfile.ps\"\nset term post\nplot x*x\n");

        pclose(fp);
        return 0;
}



Bye
	d!rk

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