Re: Make Gnuplot using the mathematical minus sign

[Ethan A M. <sf...@us...>]

On Tuesday, 27 January, 2015 09:45:35 Maurizio Tomasi wrote:
> Hi to everybody,
> 
>   Yesterday I posted a question on StackOverflow about the possibility to
> use the mathematical minus sign for negative numbers for tick labels in
> Gnuplot instead of the hyphen. (This is a request I got from the referee of
> a paper I've just submitted.)

Some gnuplot terminals already do this, or can easily be told to do so.
For example, in the PostScript terminal this is done by specifying the
appropriate glyph in the encoding table that is part of the Prologue.

What terminal type are you using?

	Ethan

> 
> Although I have never hacked Gnuplot, I am fluent with C/C++ and would like
> to try to write a patch that implements this feature. I would like to ask
> you which would be the best way to do this:
> 
> 1. Implement a pair of commands ("set hyphenminus" / "unset hyphenminus") 
> which change this setting globally, i.e., on the X/Y/X2/Y2 axes.
> 
> 2. Implement a new formatting sequence, like "%h", which takes care of using
> the correct character.
> 
> My preference goes to the first option (if one cares for typographical
> correctness, chances are that it wants it on every axis.). Moreover, I would
> like to make the mathematical minus the default, and leave the possibility
> to use the hyphen only as a way to retain backwards compatibility (this is
> what Matplotlib does).
> 
> What do you think? Do you have suggestions about how to properly code this?
> 
>   Maurizio.
> 
> 
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