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IDL New Graphics Axis function: bug or feature? [message #81757]

Mon, 22 October 2012 17:33

manodeep@gmail.com
Messages: 33
Registered: June 2006

Member

Hi everyone,

I was trying to add an alternate X-axis to a new graphics plot when I could not place this new X-axis on the plot no matter how I tried. It turns out that the original data co-ordinate was established with /YLOG and the AXIS function wanted the location to be set in alog10(yrange[1]).

Here's an example code:
--------------------------------------
;;; generate some random data
N = 100
x = dindgen(N)
y = randomu(seed,N)*N

;;; create the plot
p = plot(x,y,/ylog) ;;; use YLOG
ax = p.axes
ax[2].hide=1 ;;; hide the top X-axis

;;; Now try to plot a new alternate X-axis
ymax = (p.yrange)[1]
a0 = axis('X',location=[0.0,ymax],tickdir=1);;; axis does not appear
a1 = axis('X',location=[0.0,alog10(ymax)],tickdir=1) ;;; axis appears at the top

end
--------------------------------------
IDL> print,!version
{ x86_64 linux unix linux 8.0 Jun 18 2010 64 64}

Looking through the newsgroup, it seems this behaviour is in line with what Sean Davis saw here: https://groups.google.com/forum/#!topic/comp.lang.idl-pvwave /lNWGIDjJQh8

I don't think IDL Direct Graphics AXIS procedure worked in this fashion. Anybody aware of the reason for the change?

Cheers,
Manodeep

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[Message index]

		IDL New Graphics Axis function: bug or feature? By: manodeep@gmail.com on Mon, 22 October 2012 17:33
		Re: IDL New Graphics Axis function: bug or feature? By: lecacheux.alain on Wed, 24 October 2012 22:51
		Re: IDL New Graphics Axis function: bug or feature? By: chris_torrence@NOSPAM on Fri, 26 October 2012 12:47
		Re: IDL New Graphics Axis function: bug or feature? By: manodeep@gmail.com on Wed, 24 October 2012 09:31

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