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Octave Code Contribution


From: Nathan Bliss
Subject: Octave Code Contribution
Date: Fri, 27 Feb 2009 08:52:21 +0000 (GMT)

Hi,

I'm interested in developing for Octave so that I can add phase constellation 
plots to the gnuplot capabilities. These are the kind of constellation plots 
used in radio comms with I/Q values corresponding to real & imaginary points on 
a phase constellation diagram.

For example, I have an Octave array that contains real and imaginary values 
(complex values). I want to, say, pass this array to gnuplot but use some of 
the specialised native plotting functions of gnuplot to label the axes as 
'Real' and 'Imaginary' and then to plot each complex value in the array as a 
vector, but where a symbol is drawn at the point and with no lines or 
connections being made between the points. 

As far as I can tell this functionality doesn't yet exist in Octave or SciLab. 
These kind of plots are used extensively in mobile telecoms radio software and 
radio signal measurement equipment at the demodulation level.

I would be very grateful for any pointers you can give me for the following:

1. What compiler I need to install to write extra functions that involve 
passing data from Octave to gnuplot?

2. Information about the Octave API calls I can use and also the gnuplot API 
calls I need to pass data between Octave and gnuplot?

3. Do you have an example of how to add a new source code library to Octave, 
add a function that uses one of gnuplot's native plotting functions using a 
gnuplot API call, and then compile everything and run this new functionality?

Many thanks,
Nathan Bliss



      



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