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Re: plot legends - pvwave [message #4950 is a reply to message #4859]

Mon, 21 August 1995 00:00

rep2857
Messages: 28
Registered: December 1994

Junior Member

In article <414qlu$ts7@seralph9.essex.ac.uk>,
Pearson J E <jepear@essex.ac.uk> wrote:
> My query concerns the addition of legends on plots created by pvwave.
>
> As I understand it, the positioning of a legend can only be accomplished by
> using the XYOUTS function where x and y represent coordinates corresponding to
> the x and y axis of the plot. In my sistuation I have a 2D graph whose axis can
> vary significantly depending on choices made in the program. Therefore by using
> the XYOUTS function my words often can end up on top of each other or not even
> on the plot itself.
>
> Is there anyway of making the positioning of the legend independent of the x
> and
> y axis of the plot ??

Cc'd to jepear@essex.ac.uk

Sure. XYOUTS can position data anywhere (even off the drawing area as I
have inadvertently found out on several occasions). The key is to use
device coordinates rather than plot coordinates for positioning. The
!X.S and !Y.S variables return the normalized coordinates of the
scaling factors used in positioning the plot frame. The upper right
coordinate of the plot frame can be determined with the following
commands:

xoff = !D.X_VSize * (!X.S(0) + !X.S(1) * !X.CRange(1))
yoff = !D.Y_VSize * (!Y.S(0) + !Y.S(1) * !Y.CRange(1))
xyouts, xoff, yoff, /device, 'Legend'

Add a little space in the X direction based on something like the
window dimensions and you have the starting coordinates for your
legend. Increment Y by some value say !D.Y_Ch_Size * 1.1 or whatever
seems to be appropriate for additional legend titles.

Mike Schienle Hughes Santa Barbara Research Center
Home: mgs@seldon.terminus.com Work: rep2857@sbsun0010.sbrc.hac.com
Contract Employee - Will visualize data for large amounts of money

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[Message index]

		plot legends - pvwave By: Pearson J E on Sat, 19 August 1995 00:00
		Re: plot legends - pvwave By: rivers on Tue, 22 August 1995 00:00
		Re: plot legends - pvwave By: rep2857 on Mon, 21 August 1995 00:00
		Re: Plot legends By: alenhart on Wed, 14 June 2000 00:00
		Re: Plot legends By: wlandsman on Mon, 12 June 2000 00:00

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