Re: [Discuss-gnuradio] How to use the read_float_binary.m function

[hasanimam]

Well, I have been able to run the program somehow. The following code is what
I used.

import numpy

numpy.fromfile("observed_data", dtype=float, count=-1, sep='')

Now, the problem is that the file I am getting does not show anything. I
mean the characters in the file are still unreadable.

I want numpy to convert the binary file to a readable one.

Any idea?

hasanimam wrote:
> 
> Hello Josh,
> 
> Thank you. In fact I am a very newcomer to use gnuradio.
> I tried to follow your advice.
> I wrote the code in python like,
> numpy.fromfile(observed_data, dtype=float, count=-1, sep='')
> 
> Here, observed_data is the file which is created using the gr_file_sink
> command.
> However, it gives an error called "NameError: global name 'numpy' is not
> defined".
> 
> Do you have any idea about it?
> 
> Thanks
> 
> On Fri, Oct 28, 2011 at 10:16 AM, Josh Blum <address@hidden> wrote:
> 
>>
>>
>> On 10/27/2011 06:14 PM, hasanimam wrote:
>> >
>> > Hello Marcus,
>> >
>> > I really appreciate your help.
>> >> Those files (read_float_binary.m and read_complex_binary.m) are MATLAB
>> > macros, intended to be used directly by MatLab.
>> >
>> > Did you mean that, the binary file which will be created by the
>> > gr_file_sink, is needed Matlab to open?
>> > Ok, then I will take the file to another PC where Matlab is installed
>> and
>> > will try to open it.
>> > However, I was looking for some way to directly convert the file into
>> .txt
>> > or any other readable format using the python program.
>>
>> see numpy.fromfile, use the type numpy.complex64
>>
>> The data stored to file is just an array of std::complex<float> or
>> std::complex<int16>
>>
>> >
>> >
>> >
>> >
>> >
>> > Marcus D. Leech wrote:
>> >>
>> >>> Hello,
>> >>>
>> >>> I am in deep deep trouble. And it would be really great if somebody
>> come
>> >>> up
>> >>> with any sort of help.
>> >>>
>> >>> I am trying to collect the raw data using USRP2. I used the
>> >>> gr_file_sink(itemsize, "filename") for this. The "filename" is a
>> binary
>> >>> file
>> >>> and so it cant be seen/open. I googled in the internet to find a way
>> of
>> >>> converting the binary file to something else. I found that there is
>> one
>> >>> thing named read_float_binary.m and read_complex_binary.m to convert
>> the
>> >>> data into a matlab file. This function is written in C++. I realized
>> that
>> >>> I
>> >>> have to use this function but dont know how to do it. Should I use
>> this
>> >>> function directly to the python program or in the gr_file_sink.cc
>> >>> program.
>> >>>
>> >>> It would be really helpful if somebody writes the exact command for
>> this.
>> >>>
>> >>> This is really urgent and I will appreciate it very much if somebody
>> >>> comes
>> >>> forward.
>> >>>
>> >>> Thank you
>> >> Those files (read_float_binary.m and read_complex_binary.m) are MATLAB
>> >> macros, intended to
>> >>    be used directly by MatLab.  If you don't know how to use MatLab,
>> >> this is likely the wrong list
>> >>    to get high-quality help in that direction.  Just sayin'
>> >>
>> >> --
>> >> Marcus Leech
>> >> Principal Investigator
>> >> Shirleys Bay Radio Astronomy Consortium
>> >> http://www.sbrac.org
>> >>
>> >>
>> >>
>> >> _______________________________________________
>> >> Discuss-gnuradio mailing list
>> >> address@hidden
>> >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> >>
>> >>
>> >
>>
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>>
> 
> 
> 
> -- 
> Hasan Rajib Imam
> University of Electro-Communication, Japan
> 1st year Masters Student
> Email: address@hidden
> Contact No: (+81)80-5004-5931
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
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> 
> 

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