mapsf (version 1.0.0)

mf_get_pal: Get color palettes

Description

mf_get_pal builds sequential, diverging and qualitative color palettes. Diverging color palettes can be dissymmetric (different number of colors in each of the two gradients).

Usage

mf_get_pal(
  n,
  palette,
  alpha = NULL,
  rev = c(FALSE, FALSE),
  neutral,
  breaks,
  mid
)

Value

A vector of colors.

Arguments

n

the number of colors (>= 1) to be in the palette

palette

a valid palette name. See hcl.pals to get available palette names. The name is matched to the list of available palettes, ignoring upper vs. lower case, spaces, dashes, etc. in the matching.

alpha

an alpha-transparency level in the range [0,1] (0 means transparent and 1 means opaque)

rev

logical indicating whether the ordering of the colors should be reversed

neutral

a color, if two gradients are used, the 'neutral' color can be added between them

breaks

a vector of class limit

mid

a numeric value use to divide the palette in two colors

Examples

cls <- mf_get_pal(n = c(3, 7), palette = c("Reds 2", "Greens"))
plot(1:10, rep(1, 10), bg = cls, pch = 22, cex = 4)
mtq <- mf_get_mtq()
bks <- mf_get_breaks(mtq$MED, breaks = "equal", nbreaks = 8)
pal <- mf_get_pal(
  breaks = bks, mid = 15000,
  palette = c("Dark Mint", "Burg"), neutral = "grey90"
)
mf_map(mtq, "MED", "choro", breaks = bks, pal = pal)
pal <- mf_get_pal(breaks = bks, mid = bks[4], palette = c("Dark Mint", "Burg"))
mf_map(mtq, "MED", "choro", breaks = bks, pal = pal)