Re: graphics-branch in CVS

[Timothée Lecomte]

Joe Koski wrote:
> on 12/7/06 4:27 PM, Timothée Lecomte at address@hidden wrote:
>
>   
> > John W. Eaton wrote:
> >     
> > > On  7-Dec-2006, Timoth�e Lecomte wrote:
> > >
> > > | gnuplot 4.2 (rc2 available) has a way to determine that. It can be done
> > > | with the read-only variables GPVAL_X_MIN and friends. Use 'show
> > > | variables all' to see all the available state variables, and 'help
> > > | gnuplot-defined' for more information.
> > >
> > > OK, but we are communicating with gnuplot through a one-directional
> > > pipe.  Do you have a reliable way to do two-way communication with
> > > gnuplot?
> > >
> > > jwe
> > >   
> > >       
> > Oh, I thought octave was using a two-way pipe, as it was pointed out
> > some time ago to get feedback from a click on the plot window.
> > If it's not the case, then I don't know...
> >
> > Timothée
> >     
>
> Timothée, John,
>
> With the gnuplot-4.2.rc2 installed on my G5 Mac, I get the following from
> Timothée's suggested commands:
>
> Joe-Koskis-Computer:~/Codes/EMD Revised Convergence jakoski$ gnuplot
>
> <...>
> Terminal type set to 'aqua'
> gnuplot> set font "helvetica,24"
> gnuplot> show variables all
> <...>
> Note that my change of font and font size does not show in the output. How
> would the "read-only" variables such as GPVAL_X_MAX be accessed from the
> interface? Is there a one-to-one mapping from all gnuplot set commands to
> the "read-only" variables?
>   
Hi Joe,

For the font and font size command, you've been mislead by the 
flexibility of gnuplot parser.
"set font" doesn't exist by itself, it's an abbreviation of "set 
fontpath' (try "show font" to be convinced, which will be expanded to 
"show fontpath").

Instead, you can set the global font and fontsize when setting the terminal:
   set terminal aqua font "helvetica,24"
or for each plot object separately, such as:
   set title "myplot" font "helvetica,24"

As for the GPVAL_X_MAX and friends, they appear once the plot command is 
issued (how would gnuplot know the axis limits without plotting and thus 
reading the data ?).

Best regards,

Timothée


> Sorry if I've got the cart ahead of the horse with these questions.
>
> Joe
>
>