blue2red {colorRamps}

Returns a gradient color map

Description

blue2red makes a color map that runs from blue -> cyan -> yellow -> red. blue2green makes a color map that runs from blue -> magenta -> yellow -> green. green2red makes a color map that runs from green -> cyan -> magenta -> red

Usage

blue2red(n)
blue2green(n)
green2red(n)

Arguments

n

number of colors

Details

These are double-ramp maps with a sharp transition from cooler colors to warmer colors at the midpoint. With proper scaling, this will highlight the mean, median, etc.

Value

A colormap

Author(s)

Tim Keitt <[e-mail]>

References

Keitt, T. H. (2008) Coherent ecological dynamics induced by large scale disturbance. Nature 454:331-334

See Also

rgb

Examples

image(matrix(1:400, 20), col = blue2red(400))
image(matrix(1:400, 20), col = blue2green(400))
image(matrix(1:400, 20), col = green2red(400))