circlize (version 0.4.1)

colorRamp2: Color interpolation

Description

Color interpolation

Usage

colorRamp2(breaks, colors, transparency = 0, space = "LAB")

Arguments

breaks

A vector indicating numeric breaks

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", "HSV", "HLS", "LAB", "XYZ", "sRGB", "LUV", see color-class for detail.

Value

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

Details

Colors are linearly interpolated according to break values and corresponding colors through CIE Lab color space (LAB) by default. Values exceeding breaks will be assigned with corresponding maximum or minimum colors.

References

Gu, Z. (2014) circlize implements and enhances circular visualization in R. Bioinformatics.

See Also

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

Examples

# NOT RUN {
col_fun = colorRamp2(c(-1, 0, 1), c("green", "white", "red"))
col_fun(c(-2, -1, -0.5, 0, 0.5, 1, 2))
# }