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Re: transparent symbols [message #74934] Tue, 08 February 2011 10:43 Go to previous message
manodeep@gmail.com is currently offline  manodeep@gmail.com
Messages: 33
Registered: June 2006
Member
On Feb 8, 10:10 am, bing999 <thibaultga...@gmail.com> wrote:
> On Feb 8, 4:48 pm, bing999 <thibaultga...@gmail.com> wrote:
>
>> Hi,
>
>> I want to overplot symbols (filled circles) on a previously drawn
>> figure. To make it easier to read, I would like to make the symbols
>> transparent.
>> Is there a way to do that?
>
>> Thanks a lot!
>
>> cheers
>
> And please note that I would like to save the plot in PostScript... :)

While the new IDL graphics system has the capability to produce
transparent symbols etc, you still can't save the plot directly into a
postscript format (transparent regions will become opaque). You will
have to first save the plot in a png format and then convert to ps/
eps.

Overplotting on a previously-drawn image is a whole different issue.
Either ask the "supplier" (as Reimar suggested) or extract the data
from the plot using something like Dexter (http://dc.zah.uni-
heidelberg.de/dexter/ui/ui/custom/).
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