anchored.gradient: Create a color gradient with a color for zero

In fifer: A Biostatisticians Toolbox for Various Activities, Including Plotting, Data Cleanup, and Data Analysis

Description

Create a color gradient with a color for zero

Usage

anchored.gradient(minColor = "blue", maxColor = "red",
  zeroColor = "white", z = NULL, vals = 100)

Arguments

minColor	what color corresponds to the minimum value?
maxColor	what color corresponds to the maximum value?
zeroColor	what color corresponds to the middle point value?
z	The vector of numbers corresponding to the colors?
vals	how many points should the final gradient have?

Details

Other functions (e.g., number.to.colors) create a color gradient by taking a range (min and max) and begining with color 1 and ending with color 2. The problem is that sometimes, there's a critical middle point (e.g., zero) and the min and max are not symmetric around the middle point. This function aleviates that problem by creating a middle point for a fixed value (set to zero).

Value

a gradient of color

Author(s)

Dustin Fife

See Also

string.to.colors, number.to.colors,

Examples

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fifer documentation built on May 30, 2017, 7:40 a.m.