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Re: Venn diagrams

From: Kai Torben Ohlhus
Subject: Re: Venn diagrams
Date: Wed, 22 Jan 2020 15:55:28 +0900
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0

On 1/20/20 10:30 AM, Francesco Potortì wrote:
> In the end I wrote functions to draw 2- and 3-circles Venn diagrams.
> The core is there and seems to work well.  Missing things are better
> documentation, some more tests, and user interface improvements (ok,
> maybe the name too...)
> The code is at
> To give it a try, just do
> octave> demo venn3circles
> I need some advice.
> - What type of interface should I use (arguments, output results, help
>   text for functions)?  Maybe take
> as a
>   model?  Or else, which Octave function do you suggest as template?

If you want to win users over from ML fileexchange to your function,
this is a good idea.  They can just use a common interface in both
Octave and Matlab, if you decide to support both (see below).

> - Should I try and add utilities for creating full-featured Venn
>   diagrams (labels, legend)?  Ideas welcome.

I would prefer a lightweight interface which allows easy customization.
 Why caring about labels in a venn-diagram function, if I can add labels
with the respective command (one function, one purpose)?

> - Should I try and make the syntax Matlab-compatible?  I have never
>   tried this, maybe it is not worth, as I have no easy way to keep
>   checking for compatibility in the future as I do not use Matlab

This depends on your intended code location.  If it should go into
Octave core, or should become an Octave Forge community package,
Matlab-compatibility is almost impossible.  You have to use "#"
comments, for example.

> - There is some introductory text at the beginning of the file, plus
>   some docs for each function.  Is there a standard way where and how to
>   put a general discussion (documentation) about the software?

Again, this depends on your intended code location.  For Octave core
there is the user manual for general documentation

OF packages have their custom manual, e.g.

or the wiki

> - Would it make sense to contact some package author and work to include
>   this in into a package? Which one?

When looking at the overview, unfortunately, only the "miscellaneous"
packages comes to my mind...

Maybe start an own one.  A package in my opinion should not consists of
only one function, but if you have venn3(), venn2(), why not an own
package (one tool, one purpose)?


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