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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/colors.R
\name{COL2}
\alias{COL2}
\title{Get diverging colors}
\usage{
COL2(diverging = c("RdBu", "BrBG", "PiYG", "PRGn", "PuOr", "RdYlBu"), n = 200)
}
\arguments{
\item{diverging}{Diverging color Palettes}
\item{n}{the number of colors (>= 1) to be in the palette.}
}
\value{
A character vector containing color names
}
\description{
Get diverging colors from palette theme name and n. The color palettes
are from RColorBrewer, but with the middle color changing to '#FFFFFF'(white),
thus we can visualize element 0 with white color.
Diverging colors are suitable for visualize a matrix which elements are partly positive and
partly negative (e.g. correlation matrix in [-1, 1], or [-20, 100]).
}
\examples{
## diverging colors
par(mar = c(0, 0, 0, 0) + 0.1)
plot(0, xlim = c(-0.1, 1), ylim = c(0, 1), type = 'n')
col = c('RdBu', 'BrBG', 'PiYG', 'PRGn', 'PuOr', 'RdYlBu')
for(i in 1:length(col)) {
colorlegend(COL2(col[i]), -10:10/10, align = 'l', cex = 0.8, xlim = c(0, 1),
ylim = c(i/length(col)-0.1, i/length(col)), vertical = FALSE)
text(-0.01, i/length(col)-0.02, col[i], adj = 0.5, pos = 2, cex = 0.8)
}
## sequential colors
par(mar = c(0, 0, 0, 0) + 0.1)
plot(0, xlim = c(-0.1, 1), ylim = c(0, 1), type = 'n')
col = c('Oranges', 'Purples', 'Reds', 'Blues', 'Greens', 'Greys', 'OrRd',
'YlOrRd', 'YlOrBr', 'YlGn')
for(i in 1:length(col)) {
colorlegend(COL1(col[i]), 0:10, align = 'l', cex = 0.8, xlim = c(0, 1),
ylim = c(i/length(col)-0.1, i/length(col)), vertical = FALSE)
text(-0.01, i/length(col)-0.02, col[i], adj = 0.5, pos = 2)
}
## other examples to show colorlegend function
par(mar = rep(0, 4))
plot(0, xlim = c(0, 6), ylim = c(-0.5, 1.2), type = 'n')
colorlegend(rainbow(100), 0:9)
colorlegend(heat.colors(100), LETTERS[1:12], xlim = c(1, 2))
colorlegend(terrain.colors(100), 0:9, ratio.colbar = 0.6,
lim.segment = c(0, 0.6), xlim = c(2, 3), align = 'l')
colorlegend(topo.colors(100), 0:9, lim.segment = c(0, 0.6),
xlim = c(3, 4), align = 'l', offset = 0)
colorlegend(cm.colors(100), 1:5, xlim = c(4, 5))
colorlegend(sample(rainbow(12)), labels = LETTERS[1:12],
at = seq(0.05, 0.95, len = 12), xlim = c(5, 6), align = 'r')
colorlegend(colbar = grey(1:100 / 100), 1:10, col = 'red', align = 'l',
xlim = c(0, 6), ylim = c(-0.5, -0.1), vertical = FALSE)
colorlegend(sample(rainbow(12)),
labels = LETTERS[1:12], at = seq(0.05, 0.95, len = 12),
xlim = c(0, 6), ylim = c(1.1, 1.2), vertical = FALSE)
}
\seealso{
Function \code{\link{colorRampPalette}}, package \code{RColorBrewer}
}
\keyword{color}
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