Multiline labels in graphics

[Daniel J Sebald]

> I tried to patch Octave to support cell arrays; the attached 
> rudimentary patch works in principle, but has a problem: with 
> enhanced text terminals, the warnings
>
> enhanced text mode parser - ignoring spurious }
> enhanced text mode parser - ignoring spurious }
>
> from Gnuplot are dumped. I assume that the graphics code implicitly 
> assumes there's no newlines in the texts.
>
> Does somebody with better knowledge of the graphics code have a clue 
> what's going on, and even better, find a way how to fix the problem?
>
> Thanks,
>
> Moritz

Moritz,

Gnuplot has a demo "enhancedtext.dem" that uses the following syntax and 
produces multiline text (which is left aligned by default):

set label 8 "Overprint\n(v should be centred over d)" tc lt 3

Is this what you are looking for?  Just briefly looking at the patch you 
created, this line

+        concatenated = horzcat (concatenated, "\n");

is suspicious because it places a new line character of the string that is fed 
to gnuplot meaning gnuplot thinks it is an end of a line, hence error.  I think 
what you actually want is to place two characters in the stream, the backslash 
and the 'n':

+        concatenated = horzcat (concatenated, "\\n");

Dan