rescale {oce} | R Documentation |
This is helpful in e.g. developing a colour scale for an image plot. It is
not necessary that rlow
be less than rhigh
, and in fact
reversing them is a good way to get a reversed colour scale for a plot.
rescale(x, xlow, xhigh, rlow = 0, rhigh = 1, clip = TRUE)
x |
a numeric vector. |
xlow |
|
xhigh |
|
rlow |
value of the result corresponding to |
rhigh |
value of the result corresponding to |
clip |
logical, set to |
A new vector, which has minimum lim[1]
and maximum
lim[2]
.
Dan Kelley
library(oce) # Fake tow-yow data t <- seq(0, 600, 5) x <- 0.5 * t z <- 50 * (-1 + sin(2 * pi * t / 360)) T <- 5 + 10 * exp(z / 100) palette <- oce.colorsJet(100) zlim <- range(T) drawPalette(zlim=zlim, col=palette) plot(x, z, type='p', pch=20, cex=3, col=palette[rescale(T, xlow=zlim[1], xhigh=zlim[2], rlow=1, rhigh=100)])