Preview Colors
Preview colors arranged according to CIE2000 distances or manual specification.
previewColors(
cols,
method = c("grid", "MDS", "manual"),
col.order = NULL,
nrow = ceiling(sqrt(length(cols))),
ncol = nrow,
border.col = "black",
pt.cex = 2,
pt.pch = 15
)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 |
pt.pch |
point symbol used by "MDS" method |
Color sorting is based on CIE2000 distances as calculated by farver::compare_colour(). The "grid" method arranges colors in a rectangular grid with ordering based on divisive hierarchical 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 MASS::cmdscale.
Colors can be manually arranged by supplying a vector of integers to col.order and setting method='manual'.
When method = "grid" or "manual" a vector of color order is returned. When method = "MDS", the output from MASS::cmdscale.
D.E. Beaudette
# 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) # create colors using HCL space cols.hcl <- hcl(h = 0:360, c = 100, l = 50) # grid, colors sorted by dE00 previewColors(cols.hcl) # manual specification previewColors(cols.hcl, method = 'manual', col.order = 1:361) # MDS previewColors(cols.hcl, method = 'MDS', pt.cex = 1)
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