| plotting vertical lines [message #83865] |
Thu, 11 April 2013 13:04  |
Leah Huk
Messages: 8
Registered: November 2012
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Junior Member |
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Hello! I'm having a weird issue with the colors and thicknesses of vertical lines plotted using the very simple routine VLINE, written by John Johnson and found here: http://astro.berkeley.edu/~johnjohn/idlprocs/vline.pro.
I'm trying to use this routine to easily overplot markers for wavelengths of certain spectral lines over a spectra and into a .ps output file. It works, however, some of the lines appear grey and of greater thickness, with the exception of the bluest (left most) line. That one looks correct, thinner and black, despite it NOT being plotted first.
First, I tried using TVLCT (follwing your article on "Understanding IDL colors") to specify the RGB values for black and using the THICK keyword to specify thickness. This did not work. The left most line is still black and correct thickness, the others are greyish and thicker. Second thing I tried was to amend the VLINE routine to call cgOPlot instead of regular OPlot, and then called the colors in using the string name. Still doesn't work.
I am stumped. Anyone have any inkling as to why only one of my vertical lines will plot with the correct color/thickness while all the others will not?
ps_open,'filename'
cgDisplay,3000,900,/free
cgplot,x,y,title='title',xtitle='xname',ytitle='yname',color ='red',thick=3
vline,6563,color='black',linestyle=0,thick=0.75
vline,4861,color='black',linestyle=0,thick=0.75 (this one looks correct)
vline,5876,color='black',linestyle=1,thick=0.75
vline,5017,color='black',linestyle=1,thick=0.75
ps_close
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| Re: plotting vertical lines [message #83999 is a reply to message #83865] |
Thu, 11 April 2013 16:39  |
Leah Huk
Messages: 8
Registered: November 2012
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Junior Member |
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Success. Changing anti-aliasing setting in GSview (Text Alpha and Graphics Alpha eq 1) completely fixed the issue. Also, converting to .pdf displayed it properly. Thank you!! I learn something new every time I visit and post on this google group! :)
Leah H.
On Thursday, April 11, 2013 2:04:30 PM UTC-6, Leah Huk wrote:
> Hello! I'm having a weird issue with the colors and thicknesses of vertical lines plotted using the very simple routine VLINE, written by John Johnson and found here: http://astro.berkeley.edu/~johnjohn/idlprocs/vline.pro.
>
>
>
> I'm trying to use this routine to easily overplot markers for wavelengths of certain spectral lines over a spectra and into a .ps output file. It works, however, some of the lines appear grey and of greater thickness, with the exception of the bluest (left most) line. That one looks correct, thinner and black, despite it NOT being plotted first.
>
>
>
> First, I tried using TVLCT (follwing your article on "Understanding IDL colors") to specify the RGB values for black and using the THICK keyword to specify thickness. This did not work. The left most line is still black and correct thickness, the others are greyish and thicker. Second thing I tried was to amend the VLINE routine to call cgOPlot instead of regular OPlot, and then called the colors in using the string name. Still doesn't work.
>
>
>
> I am stumped. Anyone have any inkling as to why only one of my vertical lines will plot with the correct color/thickness while all the others will not?
>
>
>
> ps_open,'filename'
>
> cgDisplay,3000,900,/free
>
> cgplot,x,y,title='title',xtitle='xname',ytitle='yname',color ='red',thick=3
>
> vline,6563,color='black',linestyle=0,thick=0.75
>
> vline,4861,color='black',linestyle=0,thick=0.75 (this one looks correct)
>
> vline,5876,color='black',linestyle=1,thick=0.75
>
> vline,5017,color='black',linestyle=1,thick=0.75
>
> ps_close
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| Re: plotting vertical lines [message #84000 is a reply to message #83865] |
Thu, 11 April 2013 16:13 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Leah Huk writes:
> I am using GSview 5.0 to view my .ps. files.
>
> A little while ago I was fiddling with the lines for my vertical line markers, copy-pasting those lines over, deleting the old ones, doing a retall, then saving, recompiling, and re-running. Somehow, some of the lines would magically become the right thickness. Then I'd try implementing the same change process for all 4 of them, and all of a sudden some would revert back to being grey or the wrong thickness again. I just tried setting the thickness to an integer value
of 1, and now I have three lines of what appears to be correct thickness and color, yet one of them is still grey and too thick.
>
> Gremlins, I tell you....gremlins.
I don't think so. This is a display problem, not a PostScript problem.
I'd make sure your units are points in GSView, and I'd turn anti-
aliasing off (the usual culprit in things like this). Or, you could just
print the darn thing and see that it prints fine. Or, you could make a
PDF or PNG file out of it and see that it works fine. :-)
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")
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| Re: plotting vertical lines [message #84001 is a reply to message #83865] |
Thu, 11 April 2013 15:53 |
Leah Huk
Messages: 8
Registered: November 2012
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Junior Member |
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David,
I am using GSview 5.0 to view my .ps. files.
A little while ago I was fiddling with the lines for my vertical line markers, copy-pasting those lines over, deleting the old ones, doing a retall, then saving, recompiling, and re-running. Somehow, some of the lines would magically become the right thickness. Then I'd try implementing the same change process for all 4 of them, and all of a sudden some would revert back to being grey or the wrong thickness again. I just tried setting the thickness to an integer value of 1, and now I have three lines of what appears to be correct thickness and color, yet one of them is still grey and too thick.
Gremlins, I tell you....gremlins.
On Thursday, April 11, 2013 2:04:30 PM UTC-6, Leah Huk wrote:
> Hello! I'm having a weird issue with the colors and thicknesses of vertical lines plotted using the very simple routine VLINE, written by John Johnson and found here: http://astro.berkeley.edu/~johnjohn/idlprocs/vline.pro.
>
>
>
> I'm trying to use this routine to easily overplot markers for wavelengths of certain spectral lines over a spectra and into a .ps output file. It works, however, some of the lines appear grey and of greater thickness, with the exception of the bluest (left most) line. That one looks correct, thinner and black, despite it NOT being plotted first.
>
>
>
> First, I tried using TVLCT (follwing your article on "Understanding IDL colors") to specify the RGB values for black and using the THICK keyword to specify thickness. This did not work. The left most line is still black and correct thickness, the others are greyish and thicker. Second thing I tried was to amend the VLINE routine to call cgOPlot instead of regular OPlot, and then called the colors in using the string name. Still doesn't work.
>
>
>
> I am stumped. Anyone have any inkling as to why only one of my vertical lines will plot with the correct color/thickness while all the others will not?
>
>
>
> ps_open,'filename'
>
> cgDisplay,3000,900,/free
>
> cgplot,x,y,title='title',xtitle='xname',ytitle='yname',color ='red',thick=3
>
> vline,6563,color='black',linestyle=0,thick=0.75
>
> vline,4861,color='black',linestyle=0,thick=0.75 (this one looks correct)
>
> vline,5876,color='black',linestyle=1,thick=0.75
>
> vline,5017,color='black',linestyle=1,thick=0.75
>
> ps_close
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