Re: [Discuss-gnuradio] How to extract part of a vector in GNURadio Companion?

[Jeff Long]

Reading this again, you're probably looking to continuously extract a 
slice from a vector type, not a vector sink as I first read it.

Ah, there is an efficient way. Convert vector-to-stream, use keep-m-in-n 
with an offset, and convert back to a vector. Hope that works.


On 01/30/2018 11:06 AM, Jeff Long wrote:
> Flowgraphs aren't procedural, so you can't say "run, then extract". But 
> you can build a flowgraph in GRC, import/run it from a small Python 
> program, and then extract a slice of the vector.
>
> On 01/30/2018 10:44 AM, kokosz wrote:
> > Dear all,
> >
> > Is there any way to extract just some part of a vector in GNURadio 
> > Companion for further processing?
> >
> > For example, FFT block returns a vector of, say, 1024 complex points 
> > in frequency domain, but I want to extract just some of them (e.g. 
> > points no. 113-250) and then process them (e.g. convert to stream and 
> > calculate their average value etc).
> >
> >
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