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

[hasanimam]

Still no ray of hope.

I am pasting the complete code here.

---------------------------------------------------------------------------------------------------------------------------
        collect_raw_data = gr.file_sink(self.fft_size, "observed_data")

        numpy.fromfile("observed_data", dtype=numpy.complex64, count=-1,
sep='')
        thingy = numpy.fromfile("observed_data", dtype=int, count=-1,
sep='')

        file = open ("outputfile", "w")

        for n in range(0, len(thingy)):
            x = str(thingy[n].real) + " " + str(thingy[n].imag)+ "\n"
            file.write(x)

        file.close()
       
       self.connect(self.u, s2v, c2mag, collect_raw_data)
---------------------------------------------------------------------------------------

What do you think what should be the output of the above alogrithm.
I am getting two output files for this algorithm.
One is "observed_data" which contains some unreadable characters. I think
this is a binary file. I have to convert this binary file to understand the
raw data.
The other one is "output" which contains nothing. I guess this file should
contain the converted data of "observed_data" file.

Still looking for some sort of help.

Thanks.




Marcus D. Leech wrote:
> 
> On 27/10/11 11:00 PM, hasanimam wrote:
>> To Josh and Marcus,
>>
>> Well I tried all aspects.
>> Here is what I did,
>>
>> a = numpy.fromfile("observed_data", dtype=numpy.complex64, count=-1,
>> sep='')
>> file = open ("outputfile", "w")
>> for n in range(0,len(a)):
>>    outstr = ("%f" % a[n]) + "\n"
>>    file.write (outstr)
>>
>> file.close()
>>
>> The output file does not contain anything. I have really no idea why
>> these
>> things are happening.
>> I thought that using numpy.formfile, I will be able to read the converted
>> binary file..however..its not happening.
>>
>> Am a little bit sad.. 
>>   
> Is your input file non-zero length?
> 
> and since you're using complex64, assuming you've read your file into 'a':
> 
> f = open("outputfile", "w")
> for n in range(0,len(a)):
>     x = str(a[n].real) + " " + str(a[n].imag)+ "\n"
>    f.write (x)
> 
> f.close()
> 
> 
> Will produce a readable-text file for output.
> 
> 
> -- 
> Principal Investigator
> Shirleys Bay Radio Astronomy Consortium
> http://www.sbrac.org
> 
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
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> 
> 

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