I'm not familiar with python. I've written a C++ block to write integers to a
text file. I use fstream.h library. Some code in general work function:
std::ofstream fw(d_filename); unsigned char *iptr = (unsigned
char*)input_items[0]; if (fw.is_open()) { for(int i = 0; i <
noutput_items * d_vlen; i++) { d_data.push_back (iptr[i]);
if (((i+1)%10) == 0) fw<<(int) d_data[i]<<std::endl; else
fw<<(int) d_data[i]<<" "; } fw.close (); } else
throw std::runtime_error("Error: Can't open file");
When I connect this block directly to one source clock (e.g. Vector Source),
this block successfully captures all the input data and write them to text file.
However, when I used this block at the end of a OFDM simulation flow graph, it
only wrote very few data to the file though I keep the flow graph running for
long time. I printed the input data in Terminal window and see that the data
stream still flow continuously.
Hoang Ngo-KhacResearch Assistant - Lab. of Signal and System, FET, UET, Vietnam
National University-Hanoi (VNU-H)Alternative email: khachoang1...@gmail.com,
hoangnk...@vnu.edu.vnMobilephone: +84.163.682.7874
> Date: Fri, 12 Sep 2014 10:46:32 +0200
> From: martin.br...@ettus.com
> To: discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] How to save a matrix of integers into a file
> using GNU Radio
>
> In the Python domain, you have lots of tools at your disposal, such as
> Pickle (you can even use scipys io module to write .mat files if you like).
>
> If you are using PMTs, you can use the metadata file sink.
>
> M
>
> On 09/12/2014 09:21 AM, Hoang Ngo-Khac wrote:
> > Dear all,
> >
> > I want to save a matrix of integers into a file, similar to .mat file in
> > MATLAB. To be more specific, my desire block should receive a stream of
> > integers, convert it to MxN matrix and save this matrix so that I can
> > get this data for further process after the flow graph stops.
> >
> > Could you give me some clue to do this in GNU Radio?
> >
> > Thank in advance,
> > Hoang
> >
> > *Hoang Ngo-Khac*
> > Research Assistant - Lab. of Signal and System, FET, UET, Vietnam
> > National University-Hanoi (VNU-H)
> > Alternative email: khachoang1...@gmail.com, hoangnk...@vnu.edu.vn
> > Mobilephone: +84.163.682.7874
> >
> >
> > _______________________________________________
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
>
>
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