makeColorFun: Generate a color interpolation function.

In tunelipt/wutils: Useful functions for data processing in a wind tunnel

Description

Generates a function that calculates a color scale.

Usage

makeColorFun(xmin, xmax, n = 100, palette = cfd.colors, underflow = NULL,
  overflow = NULL)

Arguments

xmin	Minimum value of the color scale.
xmax	Maximim value of the color scale.
n	Number of intermediate colors.
palette	Color palette used.
underflow	Color to use for smaller values, first color if NULL.
underflow	Color to use for largerr values, first color if NULL.

Details

In filled contour plots, a color corresponds to a value. This function creates a new function that given a value, returns the corresponding color. This function can use several different color palettes and can handle values outside the values limits.

Value

Function that returns a color given a numeric value.

Examples

fun <- makeColorFun(0, 1, underflow='black', overflow='white')
x <- c(-1, seq(0, 1, len=5), 2)
xcol <- fun(x)
keyWindow(x, xcol)
fun <- makeColorFun(0, 1)
xcol <- fun(x)
keyWindow(x, xcol)

tunelipt/wutils documentation built on Nov. 5, 2019, 11:01 a.m.