oce (version 0.9-13)

oceColors: Create a palette of colours

Description

Create a palette of colours

Usage

oceColorsPalette(n, which=1)
oceColorsGebco(n=9, region=c("water", "land", "both"),
	type=c("fill","line"))
oceColorsJet(n)
oceColors9A(n)
oceColors9B(n)
oceColorsTwo(n, low=2/3, high=0, smax=1, alpha = 1)

Arguments

n

the number of colors ($\ge 1$) to be in the palette.

which

an identifier for the palette (see Details).

region

the region characteristic, for oceColorsGebco.

type

the type of item drawn, for oceColorsGebco.

low

the hue, in [0,1], for the low end of a oceColorsTwo scale.

high

the hue, in [0,1], for the high end of a oceColorsTwo scale.

smax

the maximum saturation, in [0,1], for the colors of oceColorsTwo.

alpha

the alpha value, in [0,1], for the colors of oceColorsTwo.

Details

oceColorsPalette provides a variety of pre-defined palettes. which=1 yields the ColorBrewer diverging red/blue scheme while which=2 yields the ColorBrewer diverging RYB scheme. (Each is interpolated from the 11-class schemes provided on this site.)

A family of nine-color schemes is as follows: which="jet" (or which="9A" or which=9.01 for the Jet scheme; which="9B" or which=9.02 for a scheme similar to Jet but omitting the green, and somewhat desaturating the yellow and cyane.

oceColorsGebco provides palettes that mimic the GEBCO altas colours, with shades of blue for water and of brown for land.

oceColorsJet provides a palette similar to the Matlab jet palette.

oceColorsTwo provides a two-tone palette that fades to white at central values.

References

Color Brewer. http://colorbrewer2.org/

Light, A., and P. J. Bartlein, 2004. The End of the Rainbow? Color Schemes for Improved Data Graphics. Eos Trans. AGU, 85(40), doi:10.1029/2004EO400002.

Martin Jakobsson, Ron Macnab, and Members of the Editorial Board, IBCAO. Selective comparisons of GEBCO (1979) and IBCAO (2000) maps. http://www.ngdc.noaa.gov/mgg/bathymetry/arctic/ibcao_gebco_comp.html

Stephenson, David B., 2005. Comment on ``Color schemes for improved data graphics,'' by A. Light and P. J. Bartlein. Eos Trans. AGU, 86(20). (See also http://geography.uoregon.edu/datagraphics/color_scales.htm)

Examples

library(oce)
opar <- par(no.readonly = TRUE)
x <- array(1:1000, dim=c(1,1000))
par(mfrow=c(1,4))
image(x, col=oceColorsTwo(200), main="oceColorsTwo")
image(x, col=oceColorsJet(200), main="oceColorsJet")
image(x, col=oceColorsGebco(200), main="oceColorsGebco")
image(x, col=oceColorsPalette(200), main="oceColorsPalette")
par(opar)

# real-world example, with acoustic-doppler profiler data
data(adp)
par(mfrow=c(3,1))
plot(adp, which='u1')
plot(adp, which='u1', col=oceColorsJet)
plot(adp, which='u1', col=oceColors9B)