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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| #' Output a character vector containing code for a palette | ||
| #' | ||
| #' Call this function to get the code for a character vector containing a | ||
| #' palette. If using RStudio, the code will be loaded at the console prompt; | ||
| #' otherwise, it will be printed at the terminal. | ||
| #' | ||
| #' @inheritParams wa_pal | ||
| #' | ||
| #' @examples | ||
| #' pal_vector("rainier", 4) | ||
| #' | ||
| #' @export | ||
| pal_vector = function(palette, n, which=NULL, | ||
| type=c("discrete", "continuous"), reverse=FALSE) { | ||
| type = match.arg(type) | ||
| pal = wa_pal(palette, n, which, type, reverse) | ||
| varname = paste0("PAL_", toupper(attr(pal, "name"))) | ||
| code = paste0(varname, " = c(", paste0('"', pal, '"', collapse=", "), ")") | ||
| code = paste0(strwrap(code, 76, indent=0, exdent=nchar(varname) + 5), | ||
| collapse="\n") | ||
| code_output(code) | ||
| } | ||
|
|
||
| #' Output a character vector containing code for a `ggplot2` scale | ||
| #' | ||
| #' Call this function to get the code for the `scale_*` functions for a palette. | ||
| #' If using RStudio, the code will be loaded at the console prompt; | ||
| #' otherwise, it will be printed at the terminal. Assumes that `ggplot2` has | ||
| #' been loaded into the namespace, or will be by the time the scales are used. | ||
| #' | ||
| #' @param palette a `[wacolors]` palette or palette name. | ||
| #' @param which if not `NULL`, the indices or names of a subset of colors to use. | ||
| #' @param ... Other arguments passed on to [ggplot2::discrete_scale()], | ||
| #' [ggplot2::continuous_scale()], or [ggplot2::binned_scale()] to control | ||
| #' name, limits, breaks, labels and so forth. | ||
| #' @param reverse `TRUE` if the colors should be reversed. | ||
| #' | ||
| #' @examples | ||
| #' pal_functions("rainier") | ||
| #' | ||
| #' @export | ||
| pal_functions = function(palette, which=NULL, type=c("discrete", "continuous"), | ||
| reverse=FALSE) { | ||
| pal = match_pal(palette) | ||
| if (!is.null(which)) pal$pal = pal$pal[which] | ||
| if (reverse) pal$pal = rev(pal$pal) | ||
| names(pal$pal) = NULL | ||
|
|
||
| make_discr = function(aesthetic) { | ||
| pal_col_code = paste0(" pal_cols = c(", paste0('"', pal$pal, '"', collapse=", "), ")") | ||
| pal_col_code = paste0(strwrap(pal_col_code, 76, indent=2, exdent=15), collapse="\n") | ||
| pal_col_code = paste0(pal_col_code, "\n", " n_col = length(pal_cols)\n") | ||
| pal_fun_code = " ramp = grDevices::colorRampPalette(pal_cols)\n" | ||
| if (!(pal$name %in% cont_pal)) { | ||
| pal_fun_code = paste0(pal_fun_code, " pal_fun = function(n) ", | ||
| "if (n <= n_col) pal_cols[1:n] else ramp(n)\n") | ||
| } else { | ||
| pal_fun_code = paste0(pal_fun_code, " pal_fun = ramp\n") | ||
| } | ||
| pal_gen_code = paste0(' discrete_scale("', aesthetic, '", "', | ||
| pal$name, '", palette=pal_fun, ...)\n') | ||
|
|
||
| fname = paste0("scale_", aesthetic, "_", pal$name, "_d") | ||
| paste0(fname, " = function(...) {\n", pal_col_code, | ||
| pal_fun_code, pal_gen_code, "}\n") | ||
| } | ||
|
|
||
| make_cont = function(aesthetic) { | ||
| pal_cols = paste0("c(", paste0('"', pal$pal, '"', collapse=", "), ")") | ||
| pal_gen_code = paste0("scale_", aesthetic, "_gradientn(..., colours=", | ||
| pal_cols, ")") | ||
| pal_gen_code = paste0(strwrap(pal_gen_code, 76, indent=2, | ||
| exdent=23 + (aesthetic=="color")), collapse="\n") | ||
| fname = paste0("scale_", aesthetic, "_", pal$name, "_c") | ||
| paste0(fname, " = function(...) {\n", pal_gen_code, "\n}\n") | ||
| } | ||
|
|
||
| code = "" | ||
| if ("discrete" %in% type) { | ||
| code = paste0(code, make_discr("color"), make_discr("fill"), "\n") | ||
| } | ||
| if ("continuous" %in% type) { | ||
| code = paste0(code, make_cont("color"), make_cont("fill"), "\n") | ||
| } | ||
|
|
||
| code_output(code) | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| #' Helper function-palette for discrete scales | ||
| #' @importFrom grDevices colorRampPalette rgb | ||
| discr_pal = function(pal, reverse=FALSE) { | ||
| n_col = length(pal) | ||
| names(pal) = NULL | ||
| ramp = colorRampPalette(pal) | ||
| function(n) { | ||
| if (n <= n_col) | ||
| pal[1:n] | ||
| else | ||
| ramp(n) | ||
| } | ||
| } | ||
|
|
||
| #' Color palettes for `ggplot2` | ||
| #' | ||
| #' @rdname scale_wa | ||
| #' | ||
| #' @param palette a `[wacolors]` palette or palette name. | ||
| #' @param which if not `NULL`, the indices or names of a subset of colors to use. | ||
| #' @param ... Other arguments passed on to [ggplot2::discrete_scale()], | ||
| #' [ggplot2::continuous_scale()], or [ggplot2::binned_scale()] to control | ||
| #' name, limits, breaks, labels and so forth. | ||
| #' @param reverse `TRUE` if the colors should be reversed. | ||
| #' | ||
| #' @examples | ||
| #' ggplot(mtcars, aes(mpg, wt)) + | ||
| #' geom_point(aes(color = factor(cyl), size=hp)) + | ||
| #' scale_color_wa_d() | ||
| #' | ||
| #' ggplot(mtcars, aes(mpg, wt)) + | ||
| #' geom_point(aes(color = hp)) + | ||
| #' scale_color_wa_c("seattle_night", which=c("seafirst", "pike_clock")) | ||
| #' | ||
| #' ggplot(diamonds) + | ||
| #' geom_bar(aes(x = cut, fill = clarity)) + | ||
| #' scale_fill_wa_d(wacolors$sound_sunset, reverse=TRUE) | ||
| #' | ||
| #' @importFrom ggplot2 discrete_scale scale_color_gradientn | ||
| #' @export | ||
| scale_color_wa_d = function(palette="rainier", which=NULL, ..., reverse=FALSE) { | ||
| pal = match_pal(palette) | ||
| if (!is.null(which)) pal$pal = pal$pal[which] | ||
| if (reverse) pal$pal = rev(pal$pal) | ||
|
|
||
| if (pal$name %in% cont_pal) | ||
| pal_fun = colorRampPalette(pal$pal) | ||
| else | ||
| pal_fun = discr_pal(pal$pal) | ||
|
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| discrete_scale("colour", pal$name, palette=pal_fun, ...) | ||
| } | ||
|
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||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_fill_wa_d = function(palette="rainier", which=NULL, ..., reverse=FALSE) { | ||
| pal = match_pal(palette) | ||
| if (!is.null(which)) pal$pal = pal$pal[which] | ||
| if (reverse) pal$pal = rev(pal$pal) | ||
|
|
||
| if (pal$name %in% cont_pal) | ||
| pal_fun = colorRampPalette(pal$pal) | ||
| else | ||
| pal_fun = discr_pal(pal$pal) | ||
|
|
||
| discrete_scale("fill", pal$name, palette=pal_fun, ...) | ||
| } | ||
|
|
||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_color_wa_c = function(palette="ferries", which=NULL, ..., reverse=FALSE) { | ||
| pal = match_pal(palette) | ||
| if (!is.null(which)) pal$pal = pal$pal[which] | ||
| if (reverse) pal$pal = rev(pal$pal) | ||
|
|
||
| scale_color_gradientn(..., colours=pal$pal) | ||
| } | ||
|
|
||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_fill_wa_c = function(palette="ferries", which=NULL, ..., reverse=FALSE) { | ||
| pal = match_pal(palette) | ||
| if (!is.null(which)) pal$pal = pal$pal[which] | ||
| if (reverse) pal$pal = rev(pal$pal) | ||
|
|
||
| scale_fill_gradientn(..., colours=pal$pal) | ||
| } | ||
|
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||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_colour_wa_d = scale_color_wa_d | ||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_colour_wa_c = scale_color_wa_c | ||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_color_wa_b = scale_color_wa_d | ||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_colour_wa_b = scale_color_wa_d | ||
| #' @rdname scale_wa | ||
| #' @export | ||
| scale_fill_wa_b = scale_fill_wa_d | ||
|
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||
| if (F) { | ||
| ggplot(mtcars, aes(mpg, wt)) + | ||
| geom_point(aes(color = factor(cyl), size=hp)) + | ||
| scale_color_wa_d() | ||
|
|
||
| ggplot(mtcars, aes(mpg, wt)) + | ||
| geom_point(aes(colour = hp)) + | ||
| scale_color_wa_c("seattle_night", which=c("seafirst", "pike_clock")) | ||
|
|
||
| ggplot(diamonds) + | ||
| geom_bar(aes(x = cut, fill = clarity)) + | ||
| scale_fill_wa_d(wacolors$sound_sunset, reverse=TRUE) | ||
| } |
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