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
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 HawaiiTim, 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
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. >