trellis.factor.key: Color coding legend for factors Modifies a list of lattice...
In hyperSpec: Work with Hyperspectral Data, i.e. Spectra + Meta Information (Spatial, Time, Concentration, ...)

Description Usage Arguments Value Author(s) See Also Examples

trellis.factor.key is used during levelplot-based plotting of factors (for hyperSpec objects) unless transform.factor = FALSE is specified.

1	trellis.factor.key(f, levelplot.args = list())

`f`	the factor that will be color-coded
`levelplot.args`	a list with levelplot arguments

the modified list with levelplot arguments.

C. Beleites

levelplot

chondro$z <- factor (rep (c("a", "a", "d", "c"),
                          length.out = nrow (chondro)),
                     levels = letters [1 : 4])

str (trellis.factor.key (chondro$z))

plotmap (chondro, z ~ x * y)

## switch off using trellis.factor.key:
## note that the factor levels are collapsed to c(1, 2, 3) rather than
## c (1, 3, 4)
plotmap (chondro, z ~ x * y, transform.factor = FALSE)

plotmap (chondro, z ~ x * y,
         col.regions = c ("gray", "red", "blue", "dark green"))