Hello,

we are using the spectogram plot to display a 2D Matrix with about 13000x64 values and i would like to optimize the plot speed (currently about 10 fps). Because there are only 1920px pixel in width (display size), much time is wasted to try to plot pixels which physically can't be displayed.

We are also using the magnifier, zoom and pan widget to zoom into an area of interest, therefore i can't modifiy the matrix size.

I looked into the source code but i can't really find the place to change the behaivor of qwt_plot_spectrogram. My goal is to reduce the number of plotted points to the size of the displayed canvas.

Does anybody how i can make this possible?

Many thanks in advance.

Best regards,
Kevin