Support Requests item #1684009, was opened at 2007-03-19 16:01
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Category: None
Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Andrea Tagliasacchi (tallia1)
Assigned to: Nobody/Anonymous (nobody)
Summary: Multiple plots (+real time plotting)
Initial Comment:
Hi there,
I realized the following function to realize a simple 1-D vector plot (for
temporal series and so on).
########## BEGIN CODE ##########
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;
}
########## END CODE ##########
There are two principal main issues: the first is that if i call this function
multiple times, only 1 X window is opened and anyway the content of the plot is
always the one of the first function call.
A second issue (partially related to this one) is that I can't obtain a real
time plot of a 1D time-varying vector (think for example the Fourier spectrum of
a time varying signal).
Hope that you can help me with this.
Thanks, Andrea
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