Jens Oehlschlägel-Akiyoshi
2000-Feb-29 07:21 UTC
[R] mapping of colornames into hsv: half way done
Ok,
now we have the mapping of color names to color codes (see below) and
conversion to rgb (something like Ben Bolker's function), but how to convert
rgb to hsv?
Thanks to Brian Ripley, Peter Dalgaard and Ben Bolker
Details below
Regards
Jens
etc/colors.big maps 455 names to rgb in S syntax
etc/rgb.txt maps 657 names to rgb in C syntax, but unlike colors() it has
mixed upper and lower case
The C source has the information twice
rgb.c maps 657 names to rgb (mixed upper and lower case)
graphics.c maps 657 names tp colorstrings (lower case only)
internal name2col() and R colors() accesses those in graphics.c
Here is the color representations from graphics.c in R code
.ColorDataBase <- matrix(c(
"white", "#FFFFFF",
"aliceblue", "#F0F8FF",
"antiquewhite", "#FAEBD7",
"antiquewhite1", "#FFEFDB",
"antiquewhite2", "#EEDFCC",
"antiquewhite3", "#CDC0B0",
"antiquewhite4", "#8B8378",
"aquamarine", "#7FFFD4",
"aquamarine1", "#7FFFD4",
"aquamarine2", "#76EEC6",
"aquamarine3", "#66CDAA",
"aquamarine4", "#458B74",
"azure", "#F0FFFF",
"azure1", "#F0FFFF",
"azure2", "#E0EEEE",
"azure3", "#C1CDCD",
"azure4", "#838B8B",
"beige", "#F5F5DC",
"bisque", "#FFE4C4",
"bisque1", "#FFE4C4",
"bisque2", "#EED5B7",
"bisque3", "#CDB79E",
"bisque4", "#8B7D6B",
"black", "#000000",
"blanchedalmond", "#FFEBCD",
"blue", "#0000FF",
"blue1", "#0000FF",
"blue2", "#0000EE",
"blue3", "#0000CD",
"blue4", "#00008B",
"blueviolet", "#8A2BE2",
"brown", "#A52A2A",
"brown1", "#FF4040",
"brown2", "#EE3B3B",
"brown3", "#CD3333",
"brown4", "#8B2323",
"burlywood", "#DEB887",
"burlywood1", "#FFD39B",
"burlywood2", "#EEC591",
"burlywood3", "#CDAA7D",
"burlywood4", "#8B7355",
"cadetblue", "#5F9EA0",
"cadetblue1", "#98F5FF",
"cadetblue2", "#8EE5EE",
"cadetblue3", "#7AC5CD",
"cadetblue4", "#53868B",
"chartreuse", "#7FFF00",
"chartreuse1", "#7FFF00",
"chartreuse2", "#76EE00",
"chartreuse3", "#66CD00",
"chartreuse4", "#458B00",
"chocolate", "#D2691E",
"chocolate1", "#FF7F24",
"chocolate2", "#EE7621",
"chocolate3", "#CD661D",
"chocolate4", "#8B4513",
"coral", "#FF7F50",
"coral1", "#FF7256",
"coral2", "#EE6A50",
"coral3", "#CD5B45",
"coral4", "#8B3E2F",
"cornflowerblue", "#6495ED",
"cornsilk", "#FFF8DC",
"cornsilk1", "#FFF8DC",
"cornsilk2", "#EEE8CD",
"cornsilk3", "#CDC8B1",
"cornsilk4", "#8B8878",
"cyan", "#00FFFF",
"cyan1", "#00FFFF",
"cyan2", "#00EEEE",
"cyan3", "#00CDCD",
"cyan4", "#008B8B",
"darkblue", "#00008B",
"darkcyan", "#008B8B",
"darkgoldenrod", "#B8860B",
"darkgoldenrod1", "#FFB90F",
"darkgoldenrod2", "#EEAD0E",
"darkgoldenrod3", "#CD950C",
"darkgoldenrod4", "#8B6508",
"darkgray", "#A9A9A9",
"darkgreen", "#006400",
"darkgrey", "#A9A9A9",
"darkkhaki", "#BDB76B",
"darkmagenta", "#8B008B",
"darkolivegreen", "#556B2F",
"darkolivegreen1", "#CAFF70",
"darkolivegreen2", "#BCEE68",
"darkolivegreen3", "#A2CD5A",
"darkolivegreen4", "#6E8B3D",
"darkorange", "#FF8C00",
"darkorange1", "#FF7F00",
"darkorange2", "#EE7600",
"darkorange3", "#CD6600",
"darkorange4", "#8B4500",
"darkorchid", "#9932CC",
"darkorchid1", "#BF3EFF",
"darkorchid2", "#B23AEE",
"darkorchid3", "#9A32CD",
"darkorchid4", "#68228B",
"darkred", "#8B0000",
"darksalmon", "#E9967A",
"darkseagreen", "#8FBC8F",
"darkseagreen1", "#C1FFC1",
"darkseagreen2", "#B4EEB4",
"darkseagreen3", "#9BCD9B",
"darkseagreen4", "#698B69",
"darkslateblue", "#483D8B",
"darkslategray", "#2F4F4F",
"darkslategray1", "#97FFFF",
"darkslategray2", "#8DEEEE",
"darkslategray3", "#79CDCD",
"darkslategray4", "#528B8B",
"darkslategrey", "#2F4F4F",
"darkturquoise", "#00CED1",
"darkviolet", "#9400D3",
"deeppink", "#FF1493",
"deeppink1", "#FF1493",
"deeppink2", "#EE1289",
"deeppink3", "#CD1076",
"deeppink4", "#8B0A50",
"deepskyblue", "#00BFFF",
"deepskyblue1", "#00BFFF",
"deepskyblue2", "#00B2EE",
"deepskyblue3", "#009ACD",
"deepskyblue4", "#00688B",
"dimgray", "#696969",
"dimgrey", "#696969",
"dodgerblue", "#1E90FF",
"dodgerblue1", "#1E90FF",
"dodgerblue2", "#1C86EE",
"dodgerblue3", "#1874CD",
"dodgerblue4", "#104E8B",
"firebrick", "#B22222",
"firebrick1", "#FF3030",
"firebrick2", "#EE2C2C",
"firebrick3", "#CD2626",
"firebrick4", "#8B1A1A",
"floralwhite", "#FFFAF0",
"forestgreen", "#228B22",
"gainsboro", "#DCDCDC",
"ghostwhite", "#F8F8FF",
"gold", "#FFD700",
"gold1", "#FFD700",
"gold2", "#EEC900",
"gold3", "#CDAD00",
"gold4", "#8B7500",
"goldenrod", "#DAA520",
"goldenrod1", "#FFC125",
"goldenrod2", "#EEB422",
"goldenrod3", "#CD9B1D",
"goldenrod4", "#8B6914",
"gray", "#BEBEBE",
"gray0", "#000000",
"gray1", "#030303",
"gray2", "#050505",
"gray3", "#080808",
"gray4", "#0A0A0A",
"gray5", "#0D0D0D",
"gray6", "#0F0F0F",
"gray7", "#121212",
"gray8", "#141414",
"gray9", "#171717",
"gray10", "#1A1A1A",
"gray11", "#1C1C1C",
"gray12", "#1F1F1F",
"gray13", "#212121",
"gray14", "#242424",
"gray15", "#262626",
"gray16", "#292929",
"gray17", "#2B2B2B",
"gray18", "#2E2E2E",
"gray19", "#303030",
"gray20", "#333333",
"gray21", "#363636",
"gray22", "#383838",
"gray23", "#3B3B3B",
"gray24", "#3D3D3D",
"gray25", "#404040",
"gray26", "#424242",
"gray27", "#454545",
"gray28", "#474747",
"gray29", "#4A4A4A",
"gray30", "#4D4D4D",
"gray31", "#4F4F4F",
"gray32", "#525252",
"gray33", "#545454",
"gray34", "#575757",
"gray35", "#595959",
"gray36", "#5C5C5C",
"gray37", "#5E5E5E",
"gray38", "#616161",
"gray39", "#636363",
"gray40", "#666666",
"gray41", "#696969",
"gray42", "#6B6B6B",
"gray43", "#6E6E6E",
"gray44", "#707070",
"gray45", "#737373",
"gray46", "#757575",
"gray47", "#787878",
"gray48", "#7A7A7A",
"gray49", "#7D7D7D",
"gray50", "#7F7F7F",
"gray51", "#828282",
"gray52", "#858585",
"gray53", "#878787",
"gray54", "#8A8A8A",
"gray55", "#8C8C8C",
"gray56", "#8F8F8F",
"gray57", "#919191",
"gray58", "#949494",
"gray59", "#969696",
"gray60", "#999999",
"gray61", "#9C9C9C",
"gray62", "#9E9E9E",
"gray63", "#A1A1A1",
"gray64", "#A3A3A3",
"gray65", "#A6A6A6",
"gray66", "#A8A8A8",
"gray67", "#ABABAB",
"gray68", "#ADADAD",
"gray69", "#B0B0B0",
"gray70", "#B3B3B3",
"gray71", "#B5B5B5",
"gray72", "#B8B8B8",
"gray73", "#BABABA",
"gray74", "#BDBDBD",
"gray75", "#BFBFBF",
"gray76", "#C2C2C2",
"gray77", "#C4C4C4",
"gray78", "#C7C7C7",
"gray79", "#C9C9C9",
"gray80", "#CCCCCC",
"gray81", "#CFCFCF",
"gray82", "#D1D1D1",
"gray83", "#D4D4D4",
"gray84", "#D6D6D6",
"gray85", "#D9D9D9",
"gray86", "#DBDBDB",
"gray87", "#DEDEDE",
"gray88", "#E0E0E0",
"gray89", "#E3E3E3",
"gray90", "#E5E5E5",
"gray91", "#E8E8E8",
"gray92", "#EBEBEB",
"gray93", "#EDEDED",
"gray94", "#F0F0F0",
"gray95", "#F2F2F2",
"gray96", "#F5F5F5",
"gray97", "#F7F7F7",
"gray98", "#FAFAFA",
"gray99", "#FCFCFC",
"gray100", "#FFFFFF",
"green", "#00FF00",
"green1", "#00FF00",
"green2", "#00EE00",
"green3", "#00CD00",
"green4", "#008B00",
"greenyellow", "#ADFF2F",
"grey", "#BEBEBE",
"grey0", "#000000",
"grey1", "#030303",
"grey2", "#050505",
"grey3", "#080808",
"grey4", "#0A0A0A",
"grey5", "#0D0D0D",
"grey6", "#0F0F0F",
"grey7", "#121212",
"grey8", "#141414",
"grey9", "#171717",
"grey10", "#1A1A1A",
"grey11", "#1C1C1C",
"grey12", "#1F1F1F",
"grey13", "#212121",
"grey14", "#242424",
"grey15", "#262626",
"grey16", "#292929",
"grey17", "#2B2B2B",
"grey18", "#2E2E2E",
"grey19", "#303030",
"grey20", "#333333",
"grey21", "#363636",
"grey22", "#383838",
"grey23", "#3B3B3B",
"grey24", "#3D3D3D",
"grey25", "#404040",
"grey26", "#424242",
"grey27", "#454545",
"grey28", "#474747",
"grey29", "#4A4A4A",
"grey30", "#4D4D4D",
"grey31", "#4F4F4F",
"grey32", "#525252",
"grey33", "#545454",
"grey34", "#575757",
"grey35", "#595959",
"grey36", "#5C5C5C",
"grey37", "#5E5E5E",
"grey38", "#616161",
"grey39", "#636363",
"grey40", "#666666",
"grey41", "#696969",
"grey42", "#6B6B6B",
"grey43", "#6E6E6E",
"grey44", "#707070",
"grey45", "#737373",
"grey46", "#757575",
"grey47", "#787878",
"grey48", "#7A7A7A",
"grey49", "#7D7D7D",
"grey50", "#7F7F7F",
"grey51", "#828282",
"grey52", "#858585",
"grey53", "#878787",
"grey54", "#8A8A8A",
"grey55", "#8C8C8C",
"grey56", "#8F8F8F",
"grey57", "#919191",
"grey58", "#949494",
"grey59", "#969696",
"grey60", "#999999",
"grey61", "#9C9C9C",
"grey62", "#9E9E9E",
"grey63", "#A1A1A1",
"grey64", "#A3A3A3",
"grey65", "#A6A6A6",
"grey66", "#A8A8A8",
"grey67", "#ABABAB",
"grey68", "#ADADAD",
"grey69", "#B0B0B0",
"grey70", "#B3B3B3",
"grey71", "#B5B5B5",
"grey72", "#B8B8B8",
"grey73", "#BABABA",
"grey74", "#BDBDBD",
"grey75", "#BFBFBF",
"grey76", "#C2C2C2",
"grey77", "#C4C4C4",
"grey78", "#C7C7C7",
"grey79", "#C9C9C9",
"grey80", "#CCCCCC",
"grey81", "#CFCFCF",
"grey82", "#D1D1D1",
"grey83", "#D4D4D4",
"grey84", "#D6D6D6",
"grey85", "#D9D9D9",
"grey86", "#DBDBDB",
"grey87", "#DEDEDE",
"grey88", "#E0E0E0",
"grey89", "#E3E3E3",
"grey90", "#E5E5E5",
"grey91", "#E8E8E8",
"grey92", "#EBEBEB",
"grey93", "#EDEDED",
"grey94", "#F0F0F0",
"grey95", "#F2F2F2",
"grey96", "#F5F5F5",
"grey97", "#F7F7F7",
"grey98", "#FAFAFA",
"grey99", "#FCFCFC",
"grey100", "#FFFFFF",
"honeydew", "#F0FFF0",
"honeydew1", "#F0FFF0",
"honeydew2", "#E0EEE0",
"honeydew3", "#C1CDC1",
"honeydew4", "#838B83",
"hotpink", "#FF69B4",
"hotpink1", "#FF6EB4",
"hotpink2", "#EE6AA7",
"hotpink3", "#CD6090",
"hotpink4", "#8B3A62",
"indianred", "#CD5C5C",
"indianred1", "#FF6A6A",
"indianred2", "#EE6363",
"indianred3", "#CD5555",
"indianred4", "#8B3A3A",
"ivory", "#FFFFF0",
"ivory1", "#FFFFF0",
"ivory2", "#EEEEE0",
"ivory3", "#CDCDC1",
"ivory4", "#8B8B83",
"khaki", "#F0E68C",
"khaki1", "#FFF68F",
"khaki2", "#EEE685",
"khaki3", "#CDC673",
"khaki4", "#8B864E",
"lavender", "#E6E6FA",
"lavenderblush", "#FFF0F5",
"lavenderblush1", "#FFF0F5",
"lavenderblush2", "#EEE0E5",
"lavenderblush3", "#CDC1C5",
"lavenderblush4", "#8B8386",
"lawngreen", "#7CFC00",
"lemonchiffon", "#FFFACD",
"lemonchiffon1", "#FFFACD",
"lemonchiffon2", "#EEE9BF",
"lemonchiffon3", "#CDC9A5",
"lemonchiffon4", "#8B8970",
"lightblue", "#ADD8E6",
"lightblue1", "#BFEFFF",
"lightblue2", "#B2DFEE",
"lightblue3", "#9AC0CD",
"lightblue4", "#68838B",
"lightcoral", "#F08080",
"lightcyan", "#E0FFFF",
"lightcyan1", "#E0FFFF",
"lightcyan2", "#D1EEEE",
"lightcyan3", "#B4CDCD",
"lightcyan4", "#7A8B8B",
"lightgoldenrod", "#EEDD82",
"lightgoldenrod1", "#FFEC8B",
"lightgoldenrod2", "#EEDC82",
"lightgoldenrod3", "#CDBE70",
"lightgoldenrod4", "#8B814C",
"lightgoldenrodyellow","#FAFAD2",
"lightgray", "#D3D3D3",
"lightgreen", "#90EE90",
"lightgrey", "#D3D3D3",
"lightpink", "#FFB6C1",
"lightpink1", "#FFAEB9",
"lightpink2", "#EEA2AD",
"lightpink3", "#CD8C95",
"lightpink4", "#8B5F65",
"lightsalmon", "#FFA07A",
"lightsalmon1", "#FFA07A",
"lightsalmon2", "#EE9572",
"lightsalmon3", "#CD8162",
"lightsalmon4", "#8B5742",
"lightseagreen", "#20B2AA",
"lightskyblue", "#87CEFA",
"lightskyblue1", "#B0E2FF",
"lightskyblue2", "#A4D3EE",
"lightskyblue3", "#8DB6CD",
"lightskyblue4", "#607B8B",
"lightslateblue", "#8470FF",
"lightslategray", "#778899",
"lightslategrey", "#778899",
"lightsteelblue", "#B0C4DE",
"lightsteelblue1", "#CAE1FF",
"lightsteelblue2", "#BCD2EE",
"lightsteelblue3", "#A2B5CD",
"lightsteelblue4", "#6E7B8B",
"lightyellow", "#FFFFE0",
"lightyellow1", "#FFFFE0",
"lightyellow2", "#EEEED1",
"lightyellow3", "#CDCDB4",
"lightyellow4", "#8B8B7A",
"limegreen", "#32CD32",
"linen", "#FAF0E6",
"magenta", "#FF00FF",
"magenta1", "#FF00FF",
"magenta2", "#EE00EE",
"magenta3", "#CD00CD",
"magenta4", "#8B008B",
"maroon", "#B03060",
"maroon1", "#FF34B3",
"maroon2", "#EE30A7",
"maroon3", "#CD2990",
"maroon4", "#8B1C62",
"mediumaquamarine","#66CDAA",
"mediumblue", "#0000CD",
"mediumorchid", "#BA55D3",
"mediumorchid1", "#E066FF",
"mediumorchid2", "#D15FEE",
"mediumorchid3", "#B452CD",
"mediumorchid4", "#7A378B",
"mediumpurple", "#9370DB",
"mediumpurple1", "#AB82FF",
"mediumpurple2", "#9F79EE",
"mediumpurple3", "#8968CD",
"mediumpurple4", "#5D478B",
"mediumseagreen", "#3CB371",
"mediumslateblue", "#7B68EE",
"mediumspringgreen","#00FA9A",
"mediumturquoise", "#48D1CC",
"mediumvioletred", "#C71585",
"midnightblue", "#191970",
"mintcream", "#F5FFFA",
"mistyrose", "#FFE4E1",
"mistyrose1", "#FFE4E1",
"mistyrose2", "#EED5D2",
"mistyrose3", "#CDB7B5",
"mistyrose4", "#8B7D7B",
"moccasin", "#FFE4B5",
"navajowhite", "#FFDEAD",
"navajowhite1", "#FFDEAD",
"navajowhite2", "#EECFA1",
"navajowhite3", "#CDB38B",
"navajowhite4", "#8B795E",
"navy", "#000080",
"navyblue", "#000080",
"oldlace", "#FDF5E6",
"olivedrab", "#6B8E23",
"olivedrab1", "#C0FF3E",
"olivedrab2", "#B3EE3A",
"olivedrab3", "#9ACD32",
"olivedrab4", "#698B22",
"orange", "#FFA500",
"orange1", "#FFA500",
"orange2", "#EE9A00",
"orange3", "#CD8500",
"orange4", "#8B5A00",
"orangered", "#FF4500",
"orangered1", "#FF4500",
"orangered2", "#EE4000",
"orangered3", "#CD3700",
"orangered4", "#8B2500",
"orchid", "#DA70D6",
"orchid1", "#FF83FA",
"orchid2", "#EE7AE9",
"orchid3", "#CD69C9",
"orchid4", "#8B4789",
"palegoldenrod", "#EEE8AA",
"palegreen", "#98FB98",
"palegreen1", "#9AFF9A",
"palegreen2", "#90EE90",
"palegreen3", "#7CCD7C",
"palegreen4", "#548B54",
"paleturquoise", "#AFEEEE",
"paleturquoise1", "#BBFFFF",
"paleturquoise2", "#AEEEEE",
"paleturquoise3", "#96CDCD",
"paleturquoise4", "#668B8B",
"palevioletred", "#DB7093",
"palevioletred1", "#FF82AB",
"palevioletred2", "#EE799F",
"palevioletred3", "#CD6889",
"palevioletred4", "#8B475D",
"papayawhip", "#FFEFD5",
"peachpuff", "#FFDAB9",
"peachpuff1", "#FFDAB9",
"peachpuff2", "#EECBAD",
"peachpuff3", "#CDAF95",
"peachpuff4", "#8B7765",
"peru", "#CD853F",
"pink", "#FFC0CB",
"pink1", "#FFB5C5",
"pink2", "#EEA9B8",
"pink3", "#CD919E",
"pink4", "#8B636C",
"plum", "#DDA0DD",
"plum1", "#FFBBFF",
"plum2", "#EEAEEE",
"plum3", "#CD96CD",
"plum4", "#8B668B",
"powderblue", "#B0E0E6",
"purple", "#A020F0",
"purple1", "#9B30FF",
"purple2", "#912CEE",
"purple3", "#7D26CD",
"purple4", "#551A8B",
"red", "#FF0000",
"red1", "#FF0000",
"red2", "#EE0000",
"red3", "#CD0000",
"red4", "#8B0000",
"rosybrown", "#BC8F8F",
"rosybrown1", "#FFC1C1",
"rosybrown2", "#EEB4B4",
"rosybrown3", "#CD9B9B",
"rosybrown4", "#8B6969",
"royalblue", "#4169E1",
"royalblue1", "#4876FF",
"royalblue2", "#436EEE",
"royalblue3", "#3A5FCD",
"royalblue4", "#27408B",
"saddlebrown", "#8B4513",
"salmon", "#FA8072",
"salmon1", "#FF8C69",
"salmon2", "#EE8262",
"salmon3", "#CD7054",
"salmon4", "#8B4C39",
"sandybrown", "#F4A460",
"seagreen", "#2E8B57",
"seagreen1", "#54FF9F",
"seagreen2", "#4EEE94",
"seagreen3", "#43CD80",
"seagreen4", "#2E8B57",
"seashell", "#FFF5EE",
"seashell1", "#FFF5EE",
"seashell2", "#EEE5DE",
"seashell3", "#CDC5BF",
"seashell4", "#8B8682",
"sienna", "#A0522D",
"sienna1", "#FF8247",
"sienna2", "#EE7942",
"sienna3", "#CD6839",
"sienna4", "#8B4726",
"skyblue", "#87CEEB",
"skyblue1", "#87CEFF",
"skyblue2", "#7EC0EE",
"skyblue3", "#6CA6CD",
"skyblue4", "#4A708B",
"slateblue", "#6A5ACD",
"slateblue1", "#836FFF",
"slateblue2", "#7A67EE",
"slateblue3", "#6959CD",
"slateblue4", "#473C8B",
"slategray", "#708090",
"slategray1", "#C6E2FF",
"slategray2", "#B9D3EE",
"slategray3", "#9FB6CD",
"slategray4", "#6C7B8B",
"slategrey", "#708090",
"snow", "#FFFAFA",
"snow1", "#FFFAFA",
"snow2", "#EEE9E9",
"snow3", "#CDC9C9",
"snow4", "#8B8989",
"springgreen", "#00FF7F",
"springgreen1", "#00FF7F",
"springgreen2", "#00EE76",
"springgreen3", "#00CD66",
"springgreen4", "#008B45",
"steelblue", "#4682B4",
"steelblue1", "#63B8FF",
"steelblue2", "#5CACEE",
"steelblue3", "#4F94CD",
"steelblue4", "#36648B",
"tan", "#D2B48C",
"tan1", "#FFA54F",
"tan2", "#EE9A49",
"tan3", "#CD853F",
"tan4", "#8B5A2B",
"thistle", "#D8BFD8",
"thistle1", "#FFE1FF",
"thistle2", "#EED2EE",
"thistle3", "#CDB5CD",
"thistle4", "#8B7B8B",
"tomato", "#FF6347",
"tomato1", "#FF6347",
"tomato2", "#EE5C42",
"tomato3", "#CD4F39",
"tomato4", "#8B3626",
"turquoise", "#40E0D0",
"turquoise1", "#00F5FF",
"turquoise2", "#00E5EE",
"turquoise3", "#00C5CD",
"turquoise4", "#00868B",
"violet", "#EE82EE",
"violetred", "#D02090",
"violetred1", "#FF3E96",
"violetred2", "#EE3A8C",
"violetred3", "#CD3278",
"violetred4", "#8B2252",
"wheat", "#F5DEB3",
"wheat1", "#FFE7BA",
"wheat2", "#EED8AE",
"wheat3", "#CDBA96",
"wheat4", "#8B7E66",
"whitesmoke", "#F5F5F5",
"yellow", "#FFFF00",
"yellow1", "#FFFF00",
"yellow2", "#EEEE00",
"yellow3", "#CDCD00",
"yellow4", "#8B8B00",
"yellowgreen", "#9ACD32"
)
, ncol=2, byrow=T)
and a quick retrieval function
name2col <- function(name){
i <- match(name, .ColorDataBase[, 1])
.ColorDataBase[i, 2]
}
# Ben Bolker's function
# not vectorized yet
color.to.rgb <- function(color) {
# given color as hexadecimal, return RGB values
hexvec <-
c(0:9,"A","B","C","D","E","F")
rgb <- numeric(3)
names(rgb) <- c("red","blue","green")
for (i in (0:2)) {
h1 <- which(hexvec==substr(color,i*2+2,i*2+2))-1
h2 <- which(hexvec==substr(color,i*2+3,i*2+3))-1
rgb[i+1] <- h1*16+h2
}
rgb
}
On the long run, using the internal name2col is probably preferable over
duplicating the representation.
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