lattice (version 0.7-15)

latticeParseFormula: Parse Trellis formula

Description

this function is used in trellis functions. Might be useful by itself. y and g_1,...,g_n may be missing.

Usage

latticeParseFormula(model, data, dimension = 2)

Arguments

model

the model/formula to be parsed. This can be in either of two possible forms, one for 2d and one for 3d formulas, determined by the dimension argument. The 2d formulas are of the form y~x|g_1*...*g_n, and the 3d fo

data

the environment/dataset where the variables in the formula are evaluated. By default, the environment where the function was called from.

dimension

dimension of the model, see above

Value

• returns a list with components left, right, left.name, right.name, condition for 2d, and left, right.x, right.y, left.name, right.x.name, right.y.name, condition for 3d.

synopsis

Parses the formula argument of trellis functions.

See Also

xyplot, Lattice