| Re: !x.region,!y.region [message #19793] |
Tue, 25 April 2000 00:00 |
Craig Markwardt
Messages: 1869
Registered: November 1996
|
Senior Member |
|
|
"R.Bauer" <R.Bauer@fz-juelich.de> writes:
>
> this is my next question about the secrets of the plotarea
> (Direct Graphics)!
>
> How are !x.region,!y.region are calculated?
>
> It seems to me that's they are only define the plotregion if
> !P.charsize eq 1.0.
>
> If !p.charsize changes the region is not changing.
>
> How did I calculate the region which my plot is using
> from Y-Title to X-Title?
I have not had much use for !x.region and !y.region -- I can't recall
when they have worked for me.
I use !x.window and !y.window instead. These change when you change
the character size.
Example:
IDL> plot, findgen(10)
IDL> print, !x.window, !y.window
0.0937550 0.971880
0.0781300 0.960943
IDL> !p.charsize=2
IDL> plot, findgen(10)
IDL> print, !x.window, !y.window
0.187505 0.943755
0.156255 0.921880
However, I should make it clear that changing the character size alone
does not update ![xy].window. These values are only reset when you
make a PLOT command. If you do indeed need to know the plot
dimensions before making output, then you can use
PLOT, XSTYLE=(xstyle OR 4), YSTYLE=(ystyle OR 4), /NODATA, ...
which doesn't make any output but does establish the new coordinate
system.
Cheers,
Craig
--
------------------------------------------------------------ --------------
Craig B. Markwardt, Ph.D. EMAIL: craigmnet@cow.physics.wisc.edu
Astrophysics, IDL, Finance, Derivatives | Remove "net" for better response
------------------------------------------------------------ --------------
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
