smoothPalette: Replace a vector of numbers by a gradient of colors
In january3/tagcloud: Tag Clouds

Description Usage Arguments Details Value Author(s) See Also Examples

Replace a vector of numbers by a vector of colors from a palette, such that values correspond to the colors on a smooth gradient.

1 2	smoothPalette(x, pal = NULL, max = NULL, min = NULL, n = 9, palfunc = NULL, na.color = "white")

`x`	A numeric vector
`pal`	Character vector containing the color gradient onto which the numeric vector `x` will be mapped. By default, a gradient from white to black is generated. If it is a single character value, it will be treated as name of an RColorBrewer palette (see `brewer.pal`).
`max`	Values of `x` larger than `max` will be replaced by `max`
`min`	Values of `x` smaller than `min` will be replaced by `min`
`n`	Number of steps
`palfunc`	Palette function returned by colorRampPalette
`na.color`	NA values will be replaced by that color

This function is used to map a continues numerical vector on an ordinal character vector, in especially a vector of colors. Color palette can be specified using an RColorBrewer palette name.

A character vector of the same length as the numeric vector x, containing the matching colors.

January Weiner <january.weiner@gmail.com>

tagcloud

smoothPalette( 1:3 )
# will print:
# "#CCCCCC" "#666666" "#000000"

smoothPalette( 1:3, pal= "Blues" )
# will produce:
# "#F7FBFF" "#6BAED6" "#08306B"

x <- runif( 100 )
plot( 1:100, x, col= smoothPalette( x, pal= "BrBG" ), pch= 19 )