| Reverse colour table in postscript [message #24991] |
Wed, 09 May 2001 06:48 |
Jonathan Smoker
Messages: 1
Registered: May 2001
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Junior Member |
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Hello,
I would like to create a postscript file with using a reverse colour
table i.e. black for the
maximum values and white for the minimum values. So far, i've used the
following code,
set_plot,'device',/copy ; tried with and without the /copy
and with loadct
and reverse_ct
before this line.
; device, filename='myfile.ps' ; tried with and without this line.
loadct,0 ; loads the black-white
linear colour table
reverse_ct ; copied from Fanning
website
contour,image1,/fill,color=0 ; contours the image
device, /close
If I run the above using device='X', then i get the plot screen that
I wish
(i.e. peaks are black and zero is white). However, if I used device='ps'
then
i get the opposite i.e. the colour table does not appear to have been
reversed.
Of course, I can get a reverse colour table by multiplying the image by
-1.0
i suppose!.
The reverse_ct.pro progr looks like this from the Fanning website.
PRO Reverse_CT
TVLCT, r, g, b, /Get
TVLCT, Reverse(r), Reverse(g), Reverse(b)
END
If anyone has a clue that would be good.
thanks,
Jonathan.
---------------------------------------------------
Work phone number; +44(0)2890-273708 Fax;
+44(0)2890-38918
email; j.smoker@qub.ac.uk (best) or jonathan_smoker@hotmail.com
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