Re: Usage of "{}" as default fontname for gnuplot

[David Bateman]

Benjamin Lindner wrote:
>> Hello,
>>
>> currently, for the gnuplot graphics backend, the default font "*" is
>> translated into "{}" before passing to gnuplot.
>> This causes troubles with the windows terminal, and I wondered if "{}"
>> is a valid gnuplot fontname specification.
>> I glanced through gnuplot's manual, but there is no mentioning of "{}"
>> for a font name - for enhanced text, yes, but not fontname.
>> So, shouldn't it be rather "" (empty) for the default fontname?
>>     
>
> Sorry clicked send too soon, forgot the details - there's the
> offending translation:
>
> diff --git a/scripts/plot/__go_draw_axes__.m b/scripts/plot/__go_draw_axes__.m
> --- a/scripts/plot/__go_draw_axes__.m
> +++ b/scripts/plot/__go_draw_axes__.m
> @@ -2084,7 +2084,7 @@
>
>  function [f, s, fnt, it, bld] = get_fontname_and_size (t)
>    if (isempty (t.fontname) || strcmp (t.fontname, "*"))
> -    fnt = "{}";
> +    fnt = "";
>    else
>      fnt = t.fontname;
>    endif
>
> The manifestation is, that enhanced ylabel text is printed wrong, e.g.
> ylabel("foo in mm^2")
> results in the superscipt "2" being not rotated but horizontal.
>
> The problem can be reproduced within gnuplot by
>   set term windows enhanced
>   set ylabel "foo in mm^2" font "{},10"
>   plot sin(x)
> which fails, but
>   set ylabel "foo in mm^2" font ",10"
> works as expected
>
>   

Please see the bug report of why this change was made

https://savannah.gnu.org/bugs/index.php?32118

No I didn't test under windows, so didn't see this issue. However making
the change you suggest will make the issue with the TeX interpreter
under gnuplot come back

D.