Mercurial > repos > marie-tremblay-metatoul > 2dnmrannotation

comparison nmr_annotation2d/viridis.R @ 1:a4d2b1926e13 draft

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author marie-tremblay-metatoul
date Tue, 04 Feb 2020 04:05:38 -0500
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0:8035235e46c7 1:a4d2b1926e13
1 viridis <- function (n, alpha = 1, begin = 0, end = 1, direction = 1, option = "D")
2 {
3 if (begin < 0 | begin > 1 | end < 0 | end > 1) {
4 stop("begin and end must be in [0,1]")
5 }
6 if (abs(direction) != 1) {
7 stop("direction must be 1 or -1")
8 }
9 if (direction == -1) {
10 tmp <- begin
11 begin <- end
12 end <- tmp
13 }
14 option <- switch(EXPR = option, A = "A", magma = "A",
15 B = "B", inferno = "B", C = "C", plasma = "C",
16 D = "D", viridis = "D", E = "E", cividis = "E",
17 {
18 warning(paste0("Option '", option, "' does not exist. Defaulting to 'viridis'."))
19 "D"
20 })
21 map <- viridisLite::viridis.map[viridisLite::viridis.map$opt ==
22 option, ]
23 map_cols <- grDevices::rgb(map$R, map$G, map$B)
24 fn_cols <- grDevices::colorRamp(map_cols, space = "Lab",
25 interpolate = "spline")
26 cols <- fn_cols(seq(begin, end, length.out = n))/255
27 grDevices::rgb(cols[, 1], cols[, 2], cols[, 3], alpha = alpha)
28 }