vectools (version 0.3.0)

85_standardized_colors: Standardize Colors

Description

Functions for standardizing R color strings.

Note that the mapcol function can used to map between color spaces.

Usage

is.opaque (cols, ..., single.flag=TRUE)
standardize.cols (cols, …, nchannels, as.list=FALSE, as.array=FALSE)
vt3.prep.cols (cols, nchannels, single.flag=TRUE, …, as.list=FALSE,
    as.array=FALSE)

Arguments

cols

A character vector/matrix/array, including color names or hex values for sRGB/sRGB-A space.

single.flag

Logical, if true, return a single TRUE/FALSE value.

nchannels

Integer, either three or four, determining the number of output channels. If missing, there will be three if all input colors are opaque, otherwise four.

as.list, as.array

Logical values, if true, return a list or array, see value section.

…

Ignored.

Value

By default, is.opaque returns a single logical value. If single.flag is false, it returns a logical vector/matrix/array matching the dimensions of cols.

By default, standardize.cols returns a character vector/matrix/array matching the dimensions of cols. If as.list or as.array are true, it returns a list or array, respectively. In lists, each element corresponds to each channel, and in arrays, the last dimension corresponds to each channel.

vt3.prep.cols returns a length two list, containing the opaque flags and the standardized colors.

Details

The is.opaque function is used to test if the input contains any non-opaque colors.

The standardize.cols function converts all colors into a hex strings. The result will be all 3 channel or 4 channel values, not a mixture of two.

The vt3.prep.cols function is a combination of the two functions above.

Examples

# NOT RUN {
mixed.cols <- c ("black", "white", "#000000", "#FFFFFF")

standardize.cols (mixed.cols)
standardize.cols (mixed.cols, as.list=TRUE)
# }