Re: 3D plotting in GNU Radio

[krono86]

Hi Marcus!

Thanks for answering.

I don't know if time raster is good for me.Let me explain.

My block is of sync type, i receives as input a stream of scalars and produce as output as stream of vectors of length L=M*N.

I want to display the output as a NxM 2D graphic with the color mapped by the values of the vector.

If I well understand, the time raster receives as input a stream, so I need to use a "vector to stream" block in order to serialize data. Furthermore I have to set the sample rate of the sink as samp_rate*N*M (where samp_rate is the sample rate of the custom block input).

The problem is that if I set N and M as the number of columns and rows, respectively, the graphic is updated row by row and not in one shot. How can produce the complete image at each updating interval.

Thanks for help.

Ivan

Il 26.09.2023 14:22 Marcus Müller ha scritto:

> Hi Ivan,
>
> if you want to display 2D data with a color dimension, the QT GUI Time Raster Sink would a 
> possible choice. I made a quick flow graph to demonstrate:
>
> https://wiki.gnuradio.org/index.php?title=QT_GUI_Time_Raster_Sink#Example_Flowgraph
>
> On 26.09.23 13:30, krono86@tiscali.itwrote:
> > Hi all! I wrote a custom python block that emits items consisting on flattened matrices. I would like to dynamically plot these matrices as a coloured surface (similar to the waterfall sink) and update the surface based on refresh rate provided by the user. How could I implement this using gnuradio? Could you provide me an example code? Thanks a lot in advance! Ivan