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August 10, 2024 02:50
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R functions for consistent sets of colors for penguins examples
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| #' --- | |
| #' title: penguin colors | |
| #' author: Michael Friendly | |
| #' --- | |
| # Create consistent sets of colors for penguins examples | |
| # These specific colors are taken from https://github.com/srvanderplas/ggpcp-paper/blob/main/index.R | |
| # See the image at: https://allisonhorst.github.io/palmerpenguins/reference/figures/lter_penguins.png | |
| peng.colors <- function(shade=c("medium", "light", "dark")) { | |
| shade = match.arg(shade) | |
| # light medium dark | |
| oranges <- c("#FDBF6F", "#F89D38", "#F37A00") # Adelie | |
| purples <- c("#CAB2D6", "#9A78B8", "#6A3D9A") # Chinstrap | |
| greens <- c("#B2DF8A", "#73C05B", "#33a02c") # Gentoo | |
| cols.vec <- c(oranges, purples, greens) | |
| cols.mat <- | |
| matrix(cols.vec, 3, 3, | |
| byrow = TRUE, | |
| dimnames = list(species = c("Adelie", "Chinstrap", "Gentoo"), | |
| shade = c("light", "medium", "dark"))) | |
| # get shaded colors | |
| cols.mat[, shade ] | |
| } | |
| peng.colors("light") | |
| peng.colors("medium") | |
| #The `scale_name` argument of `discrete_scale()` is deprecated as of ggplot2 3.5.0. | |
| scale_fill_penguins <- function(shade=c("medium", "light", "dark"), ...){ | |
| shade = match.arg(shade) | |
| ggplot2::discrete_scale("fill", # "penguins", | |
| palette = scales:::manual_pal(values = peng.colors(shade)), ...) | |
| } | |
| scale_fill_penguins() | |
| scale_colour_penguins <- function(shade=c("medium", "light", "dark"), ...){ | |
| shade = match.arg(shade) | |
| ggplot2::discrete_scale("colour",# "penguins", | |
| palette = scales:::manual_pal(values = peng.colors(shade)), ...) | |
| } | |
| scale_color_penguins <- scale_colour_penguins | |
| theme_penguins <- function(shade=c("medium", "light", "dark"), ...) { | |
| shade = match.arg(shade) | |
| list(scale_color_penguins(shade=shade), | |
| scale_fill_penguins(shade=shade) | |
| ) | |
| } | |
| if(FALSE){ | |
| # light medium dark | |
| oranges <- c("#FDBF6F", "#F89D38", "#F37A00") # Adelie | |
| purples <- c("#CAB2D6", "#9A78B8", "#6A3D9A") # Chinstrap | |
| greens <- c("#B2DF8A", "#73C05B", "#33a02c") # Gentoo | |
| cols.vec <- c(oranges, purples, greens) | |
| (cols.mat <- | |
| matrix(cols.mat, 3, 3, | |
| byrow = TRUE, | |
| dimnames = list(species = c("Adelie", "Chinstrap", "Gentoo"), | |
| shade = c("light", "medium", "dark"))) | |
| ) | |
| # get medium colors | |
| cols.med <- cols.mat["medium",] | |
| # https://stackoverflow.com/questions/25726276/visualize-a-list-of-colors-palette-in-r | |
| library(scales) | |
| show_col(cols.vec) | |
| show_col(cols.mat) | |
| # translate into color names | |
| library(plotrix) | |
| get_color_name <- function(color_hex) { | |
| out = vector(length = length(color_hex)) | |
| for(i in seq_along(color_hex)) { | |
| out[i] <- color.id(color_hex[i])[1] | |
| } | |
| out | |
| } | |
| col.names <- get_color_name(cols.vec) | |
| col.names <- matrix(col.names, 3, 3, | |
| byrow = TRUE) | |
| dimnames(col.names) <- | |
| list(species = c("Adelie", "Chinstrap", "Gentoo"), | |
| shade = c("light", "medium", "dark")) | |
| col.names | |
| col.names[, "medium"] | |
| } | |
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