Spectrogram

[Uwe]

I recommend to try Qwt6 ( from SVN trunk ) and check QwtMatrixRasterData. The rasterview examples shows how to use it.

Uwe

[Ronayn]

Thanks very much. I will download and examine the example. I am not sure though if I can use Qwt6 with my system (the version of QT I am using is set in stone), but I will figure something out.

[Ronayn]

I've download Qwt6 and have been working on understand QwtMatrixRasterData. While I can create a single spectrogram with it using preloaded data, I cant seem to update (change) it with new data. Do I have to delete the instance of QwtMatrixRasterData and create a new one each time I want to update my plot? Or do I delete the spectrogram and recreate that and then the QwtMatrixRasterData?

[Uwe]

At least you have to invalidate the cached image, when you change your data behind the back of your spectrogram item.

See http://qwt.sourceforge.net/class_qwt...6cfbd509ef65b5

Uwe