pals (version 1.5)

pal.bands: Show palettes and colormaps as colored bands

Description

Show palettes as colored bands.

Usage

pal.bands(..., n = 100, labels = NULL, main = NULL, gap = 0.1,
  sort = "none", show.names = TRUE)

Arguments

...

Palettes/colormaps, each of which is either (1) a vectors of colors or (2) a function returning a vector of colors.

n

The number of colors to display for palette functions.

labels

Labels for palettes

main

Title at top of page.

gap

Vertical gap between bars, default is 0.1

sort

If sort="none", palettes are not sorted. If sort="hue", palettes are sorted by hue. If sort="luminance", palettes are sorted by luminance.

show.names

If TRUE, show color names

Details

What to look for:

1. A good discrete palette has distinct colors.

2. A good continuous colormap does not show boundaries between colors. For example, the rainbow() palette is poor, showing bright lines at yellow, cyan, pink.

Examples

# NOT RUN {
pal.bands(c('red','white','blue'), rainbow)

op=par(mar=c(0,5,3,1))
pal.bands(cubehelix, gnuplot, jet, tol.rainbow, inferno,
  magma, plasma, viridis, parula, n=200, gap=.05)
par(op)

# Examples of sorting
labs=c('alphabet','alphabet2', 'glasbey','kelly','polychrome', 'watlington')
op=par(mar=c(0,5,3,1))
pal.bands(alphabet(), alphabet2(), glasbey(), kelly(),
  polychrome(), watlington(), sort="hue",
  labels=labs, main="sorted by hue")
par(op)
pal.bands(alphabet(), alphabet2(), glasbey(), kelly(),
  polychrome(), watlington(), sort="luminance",
  labels=labs, main="sorted by luminance")

# }

Run the code above in your browser using DataCamp Workspace