Color coding legend for factors Modifies a list of lattice arguments (as for levelplot, etc.) according to the factor levels. The colorkey will shows all levels (including unused), and the drawing colors will be set accordingly.
trellis.factor.key is used during levelplot-based plotting of factors (for
hyperSpec objects) unless transform.factor = FALSE is specified.
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
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"))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.