| PlotS and symbol characteristics [message #27940] |
Tue, 13 November 2001 12:01 |
btt
Messages: 345
Registered: December 2000
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Senior Member |
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Hello,
I have a simple 'how come' question that someone with some understanding
of IDL history and/or innards might be able to answer. I have lived with
the 'jus cuz' answer just fine; but once in a while a question like this
makes me stop and think (can you smell the smoke?)
My question is regarding the treatment of symbol chacteristics when
calling the PLOTS command. The COLOR keyword can be specified as a
vector in a call to PLOTS but no other characteristics maybe a vector.
Thus to have symbol size (SYMSIZE) or other characteristics linked to
some kind of data attribute requires a loop.
;scale symbols from 1 to 2 based on Y data
mySymSize = 1.0 + (Y - Min(Y))/(Max(Y) - Min(Y))
Plot, X,Y, /NoData
For i = 0, n do PlotS, X[i], Y[i], symSize = mySymSize[i], ...
So, how come? Is this simply a missing feature in the implementation of
PLOTS or is there something else that limits PLOTS that makes it
impossible?
(I'm sending a feature request in, although I have a foggy memory of
doing this a couple of IDL versions ago. From what I gather reading
earlier comments here, updates to the direct graphics system may have a
low priority at RSI. But what the heck, we just got double precision in
DG!)
Thanks for any thoughts on this,
Ben
--
Ben Tupper
Bigelow Laboratory for Ocean Science
180 McKown Point Road
West Boothbay Harbor, ME 04575
www.bigelow.org
btupper@bigelow.org
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