Reading IQ WAV files generated by kiwirecorder.py

[jburnett007]

I am trying to working thru the paragraph below on my Ubuntu 20.04 using Octave:
Working with the recorded .wav files
There is an octave extension for reading such WAV files, see read_kiwi_wav.cc where the details of the non-standard WAV chunk can be found; it needs to be compiled in this way mkoctfile read_kiwi_wav.cc.
For using read_kiwi_wav an octave function proc_kiwi_iq_wav.m is provided; type help proc_kiwi_iq_wav in octave for documentation.

I have recording a wav file using kiwirecorder.py, m is set to iq and using --kiwi-wav
I have installed Octave. In Octave I generated a read_kiwi_iq_wav.oct file.
I now get the following error:

proc_kwi_iq_wav.m 20211008T150350Z_702000_jnb_iq.wav
parse error:

syntax error

proc_kwi_iq_wav.m 20211008T150350Z_702000_jnb_iq.wav
^
Seems it does not like the file name that kiwirecorder.py generated.

Can you please give me some guidance
Thanks
ZS2B

[hcab14]

you should use:

[x,xx,fs,last_gpsfix]=proc_kiwi_iq_wav('20211008T150350Z_702000_jnb_iq.wav', 255);
z=cat(1,x.z);
t=cat(1,x.gpssec)+1e-9*cat(1,x.gpsnsec);
q=cat(1,x.gpslast);

where z are the IQ samples, t are timestamps for each sample and q give you an idea how recent the timestamps are.

[hcab14]

I'd also advise to read the introductory chapters of the octave manual.

[jburnett007]

Thank you for your guidance. I have been doing more reading as you suggested of the Octave Documentation.
I think I am making progress in trying to run 'proc_kiwi_iqwav.m' in GNU Octave, version 5.2.0
This is what I am getting now:

[x, xx, fs, last_gpsfix]=proc_kiwi_iq_wav('20211008T150424Z_702000_jnb_iq.wav', 255)
error: 'fn' undefined near line 24 column 34
error: called from
proc_kiwi_iq_wav at line 24 column 15

Line 24 looks like it is trying to run kiwi_iq_wav
Is there now something not right with read_kiwi_iq_wav.oct ?
In the command window of Octave I ran:
mkoctfile read_kiwi_iq_wav.cc
And it did produce the 'read_kiwi_iq_wav.oct' file.
I shall continue reading and to do more examples.