Would this accomplish what you're trying to do? http://www.r-bloggers.com/define-intermediate-color-steps-for-colorramppalette/
Or some combination of ?colorRampPalette and ?cut or classIntervals() from package classInt. On Wed, Dec 12, 2012 at 7:00 AM, jeff6868 <geoffrey_kl...@etu.u-bourgogne.fr > wrote: > Hello everybody, > > I'm trying to create my own color palette on R, in order to interpolate > some > different temperature data on different maps (daily means, seasonal > means,...). > > I would like to create a color palette which works for each map, so I need > a > color palette between -40 and +40°C. Sometimes my data for one map range > from -10 to +20, sometimes from 10 to 30, etc... but always between -40 and > +40°C. > > I would like a fluent color gradation between my extremas (-40 and +40), > with different colors between customed values. > > For example, if the temperature is under -20°C I would like the color > "darkblue", then if the temperature is between -20 and 0°C I would like the > color "lightblue", then between 0 and 20°C the color "yellow" and finally > over 20°C the color "red". > > Is it possible to create a fluent gradation color palette with customed > colors (not just one color for each part, but something fluent based on the > chosen colors) ? > Something like this: http://i.stack.imgur.com/5NoJh.jpg > > I would like then to join this customed color palette to all my "levelplot" > or "image.plot" functions,in order to create all my maps. > > Any help for doing this would be very much appreciated! > > Thanks a lot! > > > > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/create-a-color-palette-with-custom-ranges-between-colors-tp4652875.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@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. > -- Nicole K.S. Barker Ph.D Student / Étudiante au Doctorat, Université Laval Faculté de foresterie, de géographie et de géomatique 2405, rue de la Terrasse, bureau 2107, Québec (QC), G1V 0A6 Tél. 418-656-2131 ext 6110 Ducks Unlimited Canada / Canards Illimités Canada 710 Bouvier, bureau 260, Québec (QC), G2J 1C2 Tél. (418) 623-1650 ext 37; Fax (418) 623-0420 [[alternative HTML version deleted]]
______________________________________________ R-help@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.
