colorRamp2 {colorRamp2}

Generate color mapping functions

Description

Generate color mapping functions

Usage

colorRamp2(breaks, colors, transparency = 0, space = "LAB",
    hcl_palette = NULL, reverse = FALSE)

Arguments

breaks

A vector of numeric break values.

colors

A vector of colors which correspond to values in breaks.

transparency

A single value in [0, 1]. 0 refers to no transparency and 1 refers to full transparency.

space

Color space in which colors are interpolated. Value should be one of "RGB", "LAB", "XYZ", "sRGB", "LUV", see color-class for details.

hcl_palette

Name of the HCL palette. Value should be supported in hcl.pals.

reverse

Whether should the colors in hcl_palette be reversed.

Details

Colors are linearly interpolated according to the break values and corresponding colors through a certain color space. Values exceeding breaks will be assigned with corresponding maximum or minimum colors.

Value

A function which accepts a vector of numeric values and returns interpolated colors.

See Also

col2value converts back to the original values by providing the color mapping function generated by colorRamp2.

Examples

col_fun = colorRamp2(c(-1, 0, 1), c("green", "white", "red"))
col_fun(c(-2, -1, -0.5, 0, 0.5, 1, 2))