Re: [Discuss-gnuradio] saving a complex data into a file

[Josh Blum]

On 10/30/2012 03:24 AM, Jose Torres Diaz wrote:
> Hi Community,
> 
> I'm trying to save complex data from a block into a file, in order to
> process the information later on. My code is very simple, as shown bellow:
> 
> //Definition of values
> std::vector<float> complex_values(4);
> 
> complex_values[0]=(-0.707,-0.707);
> complex_values[1]=(0.707,-0.707);
> complex_values[2]=(-0.707,0.707);
> omplex_values[3]=(0.707,0.707);
> 
> myfile.open ("/home/usrpvm/Desktop/examples/binary_complex");
> 
> myfile <<(char*)&complex_values[0];
> myfile <<(char*)&complex_values[1];
> myfile <<(char*)&complex_values[2];
> myfile <<(char*)&complex_values[3];

You are casting it into a char * that isnt null terminated.

> 
> When I finish, I check my values with hexdump command:
> 
> hexdump binary_complex -v -e ' 2/4 "%10f "' -e '"\n"'
>  -0.707000  -0.707000
>   0.707000   0.707000
>  -0.707000   0.707000
>   0.707000   0.707000
>   0.707000   0.707000
> 
> As you can see, there are more values that I'm saving and there are some
> values missing. I think I am doing something wrong when I save the values.
> 
> Anyone can point me to the right direction?
> 
> Thanks for your time,
> 
> Jose.


take a look at uhd/host/examples/rx_samples_to_file.cpp
http://code.ettus.com/redmine/ettus/projects/uhd/repository/revisions/master/entry/host/examples/rx_samples_to_file.cpp#L91

-josh
> 
> 
> 
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>