comp.lang.idl-pvwave archive: archive » Plotting a horizontal line over a cgImage

Home » Public Forums » archive » Plotting a horizontal line over a cgImage

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Plotting a horizontal line over a cgImage [message #93582]

Mon, 29 August 2016 09:03

Christina Haig
Messages: 4
Registered: August 2016

Junior Member

This question probably has a very specific audience, but anyone who might be able to help me I would greatly appreciate.

Here is a good example of a cgimage plot, somewhat complex, but nothing untoward:

p = pos[*,0]
cgimage,data1,/DEVICE,/SCALE,/AXES,position=[p[0],p[1],p[2], p[3]],$
xrange=[mint,maxt],yrange=[minp,maxp],charsize=3,$
AXKEYWORDS={xtickformat:'(A1)',ylog:1,yticks:2,$
ytickname:['10!e0','10!e1','10!e2']},/noerase

As you can see, the yrange goes roughly from 1 to 100ish. I would like to plot a horizontal line at 2 that references the axes set in the cgimage command, and at the position of the same (there are 12 total plots in my output). Now oplot obviously does not allow the position command. So I attempted to cleverly use the cgplot command to overplot the line.

cgplot,[mint,maxt],[2.0,2.0],thick=4,line=5,color=255,$
position=[p[0],p[1],p[2],p[3]],/overplot

However nothing shows up in my plot. Can anyone advise me how I might solve this problem?

Thanks,
Christina

Report message to a moderator

[Message index]

		Plotting a horizontal line over a cgImage By: Christina Haig on Mon, 29 August 2016 09:03
		Re: Plotting a horizontal line over a cgImage By: wlandsman on Mon, 29 August 2016 11:20
		Re: Plotting a horizontal line over a cgImage By: Christina Haig on Mon, 29 August 2016 12:29
		Re: Plotting a horizontal line over a cgImage By: wlandsman on Tue, 30 August 2016 06:59
		Re: Plotting a horizontal line over a cgImage By: Christina Haig on Mon, 29 August 2016 11:20
		Re: Plotting a horizontal line over a cgImage By: Jeremy Bailin on Thu, 22 September 2016 14:08
		Re: Plotting a horizontal line over a cgImage By: Christina Haig on Fri, 23 September 2016 12:04

Previous Topic:	Need e-book of Image Analysis, Classification and Change Detection in Remote Sensing: With Algorithms for ENVI/IDL and Python by Mort Canty
Next Topic:	Convert MJD date range to number of days elapsed in IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 13:58:01 PDT 2025

Total time taken to generate the page: 0.00181 seconds