search for: rgb2col

Dear List, I have a 47 species * 83 samples matrix containing percentage abundance data. I have two cluster analyses one of the samples and one of the species, and have ordered the rows and columns of the species by samples matrix according to these two cluster analyses. So far so good! Now what I want to do is create a plot with the species dendrogram at the top of the plot, the samples

Dear r-helpers, I wonder whether, given the "#rrggbb" representation of a colour, there is a simple way to select the complementary colour, also expressed as a "#rrggbb" string. Any suggestions would be appreciated. John -------------------------------- John Fox, Professor Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604

...(ColorCMYs?) however the R-user probably shouldn't see the internal ColorIntegers of the C-code, as this might lead to confusion with the colornumbers resulting from the palette settings. So the R-user should see functions translating ColorName2ColorHexcode() ColorHexcode2ColorRGB() and ColorRGB2ColorHSV() and backwards ColorHSV2ColorRGB() ColorRGB2ColorHexcode(), rather not ColorHexcode2Colorname() as not every possible color is granted to have a name. Regards Jens P.S. the folowing function colorcode() I think is more general than rainbow() in three aspects: 1) works also with not-equid...