Description Usage Arguments Details Value Author(s)
View source: R/CustomColormaps.R
A set of functions that to define various attractive color scales
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | red.green(levels = 100, space = "rgb", thru = "black", ...)
yellow.blue(levels = 100, space = "rgb", ...)
grayscale(levels = 100, space = "rgb", ...)
jet(levels = 100, space = "rgb", ...)
purple.orange(levels = 100, space = "rgb", ...)
aqua.brown(levels = 100, space = "rgb", ...)
purple.green(levels = 100, space = "rgb", ...)
hot(levels = 100, space = "rgb", ...)
hot2(levels = 100, space = "rgb", ...)
orange.blue(levels = 100, space = "rgb", thru = "black", ...)
|
levels |
Integer, number of levels in the color map |
space |
a character string; interpolation in RGB or CIE Lab color spaces. |
thru |
A color, either named or as |
... |
arguments to pass to |
Many of these functions (orange.blue
, yellow.blue
,
red.green
, purple.orange
, aqua.brown
and
purple.green
) interpolate between three colors, where the function
name contains the start and stop colors, and the "thru" argument is used to
define a midpoint (typically black or white). Many of these were defined to
accomodate people with color blindness.
Colormap functions that do not follow this convention are:
grayscale maps shades of grey from black to white.
hot mimics black-body radiation, passing from black to white through red, orange and yellow (like iron being heated up).
hot2 is similar to hot, but has a more subdued shard of red as the first value after black. This is useful for de-emphasizing single data points in a heatmap of a 2D-histogram.
jet interpolates from dark blue to dark red through shades of royal blue, cyan, green, yellow and orange.
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).
M.W.Rowe, mwr.stats@gmail.com
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