我有以下颜色列表:
ddf = structure(list(r = c(0.374, 0.374, 0.051, 0.096, 0.876, 0.415,
+ 0.596, 0.724, 0.847, 0.588, 0.481, 0.142, 0.819, 0.91, 0.969,
+ 0.887, 0.432, 0.927, 0.381, 0.04), g = c(0.183, 0.905, 0.662,
+ 0.706, 0.461, 0.845, 0.07, 0.101, 0.434, 0.885, 0.366, 0.075,
+ 0.737, 0.722, 0.012, 0.536, 0.967, 0.125, 0.646, 0.898), b = c(0.528,
+ 0.337, 0.028, 0.898, 0.628, 0.286, 0.523, 0.673, 0.937, 0.604,
+ 0.337, 0.276, 0.658, 0.979, 0.451, 0.123, 0.446, 0.332, 0.656,
+ 0.798)), .Names = c("r", "g", "b"), class = "data.frame", row.names = c(NA,
+ -20L))
>
> ddf
r g b
1 0.374 0.183 0.528
2 0.374 0.905 0.337
3 0.051 0.662 0.028
4 0.096 0.706 0.898
5 0.876 0.461 0.628
6 0.415 0.845 0.286
7 0.596 0.070 0.523
8 0.724 0.101 0.673
9 0.847 0.434 0.937
10 0.588 0.885 0.604
11 0.481 0.366 0.337
12 0.142 0.075 0.276
13 0.819 0.737 0.658
14 0.910 0.722 0.979
15 0.969 0.012 0.451
16 0.887 0.536 0.123
17 0.432 0.967 0.446
18 0.927 0.125 0.332
19 0.381 0.646 0.656
20 0.040 0.898 0.798
>
如何以与彩虹()调色板的以下命令相同的方式使用它:
barplot(rep(1,100), yaxt='n',col=rainbow(100))
以下作品:
barplot(rep(1,100), yaxt='n',col=with(ddf, rgb(r,g,b)))
然而,这里的颜色序列是重复的(5 次),而不是调色板从一端延伸到另一端。