Dear List, Is there a color palette avaliable similar to what is used in satellite ocean color imagery? I.e. a gradient with blue on one end and red on the other, with yellow in the middle? I have tried topo.colors(n) but that comes out more yellow on the end. I am looking for something similar to what is found on the CoastWatch web page: http://oceanwatch.pifsc.noaa.gov/imagery/GA2009281_2009282_sst_2D_eddy.jpg Thanks! Tim Tim Clark Department of Zoology University of Hawaii
Satellite ocean color palette?
6 messages · Tim Clark, Henrique Dallazuanna, Barry Rowlingson +2 more
See ?colorRampPallete
On Fri, Oct 9, 2009 at 3:51 PM, Tim Clark <mudiver1200 at yahoo.com> wrote:
Dear List, Is there a color palette avaliable similar to what is used in satellite ocean color imagery? ?I.e. a gradient with blue on one end and red on the other, with yellow in the middle? ?I have tried topo.colors(n) but that comes out more yellow on the end. ?I am looking for something similar to what is found on the CoastWatch web page: http://oceanwatch.pifsc.noaa.gov/imagery/GA2009281_2009282_sst_2D_eddy.jpg Thanks! Tim Tim Clark Department of Zoology University of Hawaii
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Henrique Dallazuanna Curitiba-Paran?-Brasil 25? 25' 40" S 49? 16' 22" O
On Fri, Oct 9, 2009 at 7:51 PM, Tim Clark <mudiver1200 at yahoo.com> wrote:
Dear List, Is there a color palette avaliable similar to what is used in satellite ocean color imagery? ?I.e. a gradient with blue on one end and red on the other, with yellow in the middle? ?I have tried topo.colors(n) but that comes out more yellow on the end. ?I am looking for something similar to what is found on the CoastWatch web page: http://oceanwatch.pifsc.noaa.gov/imagery/GA2009281_2009282_sst_2D_eddy.jpg Thanks!
You could build one yourself with the colorRamp function:
satRampP = colorRampPalette(c("black","blue","cyan","yellow","orange","red","black"))
that looks roughly like the one in the jpg, but I'm not sure about
the black at the far end...anyway, let's see:
image(matrix(seq(0,1,len=100),100,1),col=satRampP(100))
Or you could try my colour schemes package:
https://r-forge.r-project.org/projects/colourscheme/
Barry
On Fri, 2009-10-09 at 11:51 -0700, Tim Clark wrote:
Dear List, Is there a color palette avaliable similar to what is used in satellite ocean color imagery? I.e. a gradient with blue on one end and red on the other, with yellow in the middle? I have tried topo.colors(n) but that comes out more yellow on the end. I am looking for something similar to what is found on the CoastWatch web page: http://oceanwatch.pifsc.noaa.gov/imagery/GA2009281_2009282_sst_2D_eddy.jpg Thanks! Tim Tim Clark Department of Zoology University of Hawaii
Tim,
You can make a palette in R, using colorRampPalette, look this example
Satelite.Pallete <-
colorRampPalette(c("blue3","cyan","aquamarine","yellow","orange","red"))
require(fields)
image.plot(volcano, col = Satelite.Pallete(500), legend.lab="Scale")
contour(volcano, levels = seq(90, 200, by = 5), add = TRUE)
Bernardo Rangel Tura, M.D,MPH,Ph.D National Institute of Cardiology Brazil
Thanks! The colorRampPalette() did just what I need. Tim Tim Clark Department of Zoology University of Hawaii
--- On Fri, 10/9/09, Barry Rowlingson <b.rowlingson at lancaster.ac.uk> wrote:
From: Barry Rowlingson <b.rowlingson at lancaster.ac.uk> Subject: Re: [R] Satellite ocean color palette? To: "Tim Clark" <mudiver1200 at yahoo.com> Cc: r-help at r-project.org Date: Friday, October 9, 2009, 9:06 AM On Fri, Oct 9, 2009 at 7:51 PM, Tim Clark <mudiver1200 at yahoo.com> wrote:
Dear List, Is there a color palette avaliable similar to what is
used in satellite ocean color imagery? ?I.e. a gradient with blue on one end and red on the other, with yellow in the middle? ?I have tried topo.colors(n) but that comes out more yellow on the end. ?I am looking for something similar to what is found on the CoastWatch web page:
You could build one yourself with the colorRamp function:
satRampP =
colorRampPalette(c("black","blue","cyan","yellow","orange","red","black"))
that looks roughly like the one in the jpg, but I'm not
sure about
the black at the far end...anyway, let's see:
image(matrix(seq(0,1,len=100),100,1),col=satRampP(100))
Or you could try my colour schemes package:
https://r-forge.r-project.org/projects/colourscheme/
Barry
tim.colors() in library fields
On Fri, Oct 9, 2009 at 2:51 PM, Tim Clark <mudiver1200 at yahoo.com> wrote:
Dear List, Is there a color palette avaliable similar to what is used in satellite ocean color imagery? ?I.e. a gradient with blue on one end and red on the other, with yellow in the middle? ?I have tried topo.colors(n) but that comes out more yellow on the end. ?I am looking for something similar to what is found on the CoastWatch web page: http://oceanwatch.pifsc.noaa.gov/imagery/GA2009281_2009282_sst_2D_eddy.jpg Thanks! Tim Tim Clark Department of Zoology University of Hawaii
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.