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

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

Usage

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

Arguments

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

Value

the modified list with levelplot arguments.

Author(s)

C. Beleites

See Also

levelplot

Examples

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"))

Example output

Loading required package: lattice
Loading required package: grid
Loading required package: ggplot2
Package hyperSpec, version 0.99-20180627

To get started, try
   vignette ("hyperspec")
   package?hyperSpec 
   vignette (package = "hyperSpec")

If you use this package please cite it appropriately.
   citation("hyperSpec")
will give you the correct reference.

The project homepage is http://hyperspec.r-forge.r-project.org


List of 3
 $ at         : num [1:5] 0.5 1.5 2.5 3.5 4.5
 $ col.regions: chr [1:4] "#FF80FFFF" "#FFD4FFFF" "#D4FFFFFF" "#80FFFFFF"
 $ colorkey   :List of 1
  ..$ lab:List of 2
  .. ..$ at : int [1:4] 1 2 3 4
  .. ..$ lab: chr [1:4] "a" "b" "c" "d"

hyperSpec documentation built on May 2, 2019, 5:45 p.m.