Description Usage Arguments Details Value Original URL Author(s) Examples
Allows for the selection of n
colors by using a simplified color swatch.
1 | getcolors(n)
|
n |
The number of colors to choose |
getcolors
allows selection with a mouse using the
locator
function. Following selection, a second plot opens
showing how these colors look next to each other and on a
background gradient of black to white. The function uses an RGB
color model: Red increases on the y-axis, Green increases on the
x-axis, and Blue is a repeated sequence of levels across the
x-axis.
A character vector with elements of 7 or 9 characters,
"#"
followed by the red, blue, green and optionally alpha
values in hexadecimal (after rescaling to 0 ... 255
). The
optional alpha values range from 0
(fully transparent) to
255
(opaque).
http://menugget.blogspot.com/2013/01/choosing-colors-visually-with-getcolors.html
Marc in the box
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | ## Not run:
set.seed(1)
n <- 100
x <- seq(n)
y1 <- cumsum(rnorm(n))
y2 <- cumsum(rnorm(n))
y3 <- cumsum(rnorm(n))
y4 <- cumsum(rnorm(n))
ylim <- range(c(y1, y2, y3, y4))
cols <- getcolors(4)
plot(x, y1, ylim = ylim, t = "l", col = cols[1], lwd = 3, ylab = "")
lines(x, y2, col = cols[2], lwd = 3)
lines(x, y3, col = cols[3], lwd = 3)
lines(x, y4, col = cols[4], lwd = 3)
legend("topleft", legend = paste("y", 1:4, sep = ""), col = cols,
lwd = 3)
## End(Not run)
|
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