xyplot
to parse the formula argument and evaluate various
components of the data.latticeParseFormula(model, data, dimension = 2,
subset = TRUE, groups = NULL,
multiple, outer,
subscripts,
drop)
dimension
argument. The 2d formulas are of the form
y ~ x| g1 * ...*gn
, and the 3d foxyplot
for detailsdrop.unused.levels
argument
in xyplot
, indicating whether unused levels of
conditioning factors and data variables that are factors are to be
dropped.left,
right, left.name, right.name, condition
for 2-D, and left,
right.x, right.y, left.name, right.x.name, right.y.name, condition
for 3-D. Other possible components are groups, subscrxyplot
, Lattice