multiple x windows with plplot

[dirk]

Hi all,
how is it possible to create multiple x windows in a C/C++ program (not multiple graphes in one plot like in x01c) with plplot? Creating multple instances of plstream objects didn't work, I dont know why.
(Using Pthreads should work, but is not what I really want)
Any hints are welcome!
Regards,
Dirk

[Andrea Tagliasacchi]

I would like to know the same thing... I programmed the following function to be similar to the matlab plot one.
Upon multiple calls i would just like the plot to be refreshed or a new window to be opened... however... none of this happens.

Here it is the function I am speaking about:
void plot( float* y_T, int N )
{
    PLFLT *x = new PLFLT[N];
    PLFLT *y  = new PLFLT[N];
    for (int i = 0; i < N; i++) {
        x[ i ] = i;
        y[ i ] = y_T[ i ];
    }
   
    // Initialize PLplot.
    plstream *pls = new plstream();
    plsdev( "gcw" );                 /* USE GNOME OUTPUT WINDOW LIBRARY BY DEFAULT */
    plscolbg (255,255,255);         /* SET THE GRAPH BACKGROUND */
    pls->init();                      /* INITIALIZE THE WIDGET */
    pls->font(2);                     /* CHOOSE THE FONT */
    pls->adv(0);                     /* advance to next page */
   
    pls->vpor( 0.1,0.9,0.1,0.9 );    /* position of graph inside window */       
      pls->wind( 0, N, 0, 400);         /* set axis x-range, y-range (matlab axis command)*/
   
    // Draw axis with their style
    plrgb(0,0,0); pls->box("bnstg", 0.0, 0, "bnstvg", 0.0, 0);
   
    // Plot ampl vs freq.
    plcol0(1); c_plpoin( N, x, y, 'o' ); /* plot stem graph */
    plrgb(1,0,1); pls->line( N, x, y ); /* plot line junction points */
   
    // Put labels on.
    plrgb(0,0,0); pls->mtex("b", 3.2, 0.5, 0.5, "Frequency");
    plrgb(0,0,0); pls->mtex("l", 5.0, 0.5, 0.5, "Amplitude (dB)");

    delete[] x;
    delete[] y;
    delete pls;
}