aqp (version 1.18)

previewColors: Preview Colors

Description

Preview colors as a grid arranged according to CIE2000 distances.

Usage

previewColors(cols, method='grid', col.order=NULL, 
nrow=ceiling(sqrt(length(cols))), ncol=nrow, border.col='black', pt.cex=2)

Arguments

cols

vector of R colors

method

either "grid", "MDS", or "manual", see details

col.order

integer vector used to order colors

nrow

number of rows used by "grid" method

ncol

number of columns used by "grid" method

border.col

border color used by "grid" method

pt.cex

point scaling factor used by "MDS" method

Details

Color sorting is based on CIE2000 distances as calcuated by farver::compare_colour(). The "grid" method arranges colors in a rectangular grid with ordering based on divisive heirarchical clustering of the pair-wise distances. Unique colors are used when cols contains more than 5,000 colors.

The "MDS" method arranges unique colors via classical multidimensional scaling (principal coordinates) via cmdscale().

Colors can be manually arranged by supplying a vector of integers to col.order and setting method='manual'.

Examples

# NOT RUN {
# example data
data(sp2)

# convert into SoilProfileCollection object
depths(sp2) <- id ~ top + bottom

previewColors(sp2$soil_color)
previewColors(sp2$soil_color, method = 'MDS', pt.cex = 3)
# }