Re: Graphsheet & Image.palette

["Fowler, Mark" <FowlerM@mar.dfo-mpo.gc.ca>]

Thanks to David Lorenz and Karen Byron. Dave, I expect you are using an earlier version of S-Plus than 8. I simply reran the syntax in version 7 and it worked just fine for me as well. Karen figured I was using version 8, and suggested use.legacy.graphics(T). I expect this would have worked, but running image on an interp object failed. I'm not certain this was a typical error, I may have broken something in the 8 environment with my thrashing. At any rate I think I'll continue with ver 7, and thank you very much for the help.

 

Mark Fowler
Population Ecology Division
Bedford Inst of Oceanography
Dept Fisheries & Oceans
Dartmouth NS Canada
B2Y 4A2
Tel. (902) 426-3529
Fax (902) 426-9710
Email fowlerm@mar.dfo-mpo.gc.ca
Home Tel. (902) 461-0708
Home Email mark.fowler@ns.sympatico.ca

 

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From: David L Lorenz [mailto:lorenz@usgs.gov]
Sent: May 27, 2008 10:52 AM
To: Fowler, Mark
Subject: Re: [S] Graphsheet & Image.palette

Mark, 
  I copied your graphsheet call, pasted it into 
S-PLUS and it worked for me. To prove to myself that it worked, I entered 
image(matrix(1:100, ncol=10)) and got an image grading from blue through green 
and then to red going from the bottom row to the top row. 
Dave

"Fowler, Mark" <FowlerM@mar.dfo-mpo.gc.ca>
Sent by: s-news-owner@lists.biostat.wustl.edu

05/23/2008 01:05 PM

To	s-news@lists.biostat.wustl.edu
cc
Subject	[S] Graphsheet & Image.palette

Hello, 
       Seemed straightforward, but couldn't find the answer in the 
archives (S or R). I want to use a custom color scheme for plotting images 
(programmatically, not interactively), for example

graphsheet(num.image.colors = 3, num.image.shades = "50,50",
   image.color.table = "0,0,255|0,255,0|255,0,0")
image(xyzobj,zlim=c(0,30), na.rm=T)

        However the resulting graph just uses whatever color scheme exists in image.palette, and image.palette is unaffected by the graphsheet command. Anybody know how to accomplish this? Or maybe a way to derive an image.palette from graphsheet or graphsheet-style specifications (I dread using the names).

Mark Fowler
Population Ecology Division
Bedford Inst of Oceanography
Dept Fisheries & Oceans
Dartmouth NS Canada
B2Y 4A2
Tel. (902) 426-3529
Fax (902) 426-9710
Email fowlerm@mar.dfo-mpo.gc.ca
Home Tel. (902) 461-0708
Home Email mark.fowler@ns.sympatico.ca