Re: new GPVAL_ variables

[Ethan M. <merritt@u.washington.edu>]

On Wednesday 02 July 2008 14:51:44 Petr Mikulik wrote:
> I've just updated 
> 
> Subject: [ gnuplot-Feature Requests-1939687 ] GPVAL_PLOT, _VIEW_X
> https://sourceforge.net/tracker/?func=detail&atid=352055&aid=1939687&group_id=2055
> 
> which adds new GPVAL_ automatic variables:
> 
> GPVAL_VIEW_ROT_X=double
> GPVAL_VIEW_ROT_Z=double
> GPVAL_VIEW_SCALE=double
> GPVAL_VIEW_SCALE_Z=double

These make sense to me.

> GPVAL_MULTIPLOT={0|1}
> GPVAL_VIEW_MAP={0|1}

Maybe.  But if multiplot mode is involved then all the other settings
are probably valid only for the final plot in the set.

> GPVAL_PLOT={0|1}
> GPVAL_SPLOT={0|1}

But I do not understand how one could use these.  They are only
true inside a plot, and inside the plot how can you query them?

As an alternative suggestion, how about providing a string 
variable
  GPVAL_LAST_PLOT
that points to the same string reported by "show plot"?
One could inspect that string to see if the previous command
was 'plot' or 'splot'.  Better yet....

> Does somebody find use for (need) other variables?

There was a question on the newsgroup, I think, about querying the
information from a "show" command from a script.  For instance,
I think there is no way for a script to check the name of the current
output file.  Could we have another string variable GP_VAL_SHOW
that always contains the result of the last "show" command? 

-- 
Ethan A Merritt