Re: Argh: Why are arrows clipped to the graph?

[Harald H. <h.h...@tu...>]

On Sat, 12 Nov 2005, Daniel J Sebald wrote:

> >  plot '< convert tux.gif rgb:-' binary filetype=rgb array=60x70 \
> >  format="%uchar %uchar %uchar" flipy u 1:2:3 with rgbimage
> >
> > It would be nice if that long combination of options had some
> > shorter form, though.
>
> Yes, the array size is a manual thing... or Harald has shown another
> feature for extracting the dimensions that I was unaware of.
>
> Well, that is nice.  Can some scripts solve this?  Or perhaps I could
> write a very generic routine based upon this concept.  Is there a way to
> send out a system command from within a C program and route the data
> back in somehow?

Yes. Have a look at Postscript's fontfile option. It starts programmes to
convert pfb or ttf to pfa by a named pipe (popen() et al.).

>  Would that be a (not very portable) solution?

Maybe, you could adapt the concept of postscript fontfile with a
operating-system-dependent default command for conversion and with
user-definable changes.

> If
> "convert" created a slightly more sophisticated format that contains the
> array dimensions and data point format, we could support that format.

What about the formats pnm, pbm? They are the most basic file formats I
know, and they are portable (I believe  pbm stands for portable bitmap).
Many programmes can produce pnm and pbm.

Best regards
Harald

-- 
Harald Harders
h.h...@tu...
http://www.harald-harders.de