Re: vector index selector

[Marcus Müller]

Hm, in that case, this would be a really easy thing to just write in an 
embedded python block!

On 15.11.21 12:48, Ali G. Dezfuli wrote:

Thanks, Marcus, but I actually want to have something like a general demultiplexer to separate the preamble from the payload.

I couldn't find a SIMPLE demuxer ("Header/Payload Demux" is very complicated.)

What you kindly said is something like a general downsampler/decimator which of course has its own use. For example, with a correlator, I put a tag at the frame start, and with "Tagged Stream Aligned" and "Stream to Vector" I will have a ready-to-be-demuxed frame to get to the payload. On Mon, Nov 15, 2021 at 2:14 PM Marcus Müller <muel...@kit.edu <mailto:muel...@kit.edu>> wrote:

    Hi!
    Not in itself, but you can do

    ---vector-->
       [Vector to Stream, num items = n]
        --->
         [Keep M in N, M=1, N=n, initial offset=index]
          ---->

    Best regards,
    Marcus

    PS: A PR to improve "keep M in N" to directly deal with vectors, or to add 
a block
    "Vector
    Extract" that does what you describe (take vectors in, and have a parameter 
with indices
    to extract) to master, would certainly be welcome.

    On 14.11.21 07:55, Ali G. Dezfuli wrote:
     > Hi all,
     > is there a block in GRC to get a vector and output a vector with 
selected indexes
    (as a
     > parameter)?
     > thanks,
     > AGD

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