mosaic (version 0.9-0)

parse.formula: Parse formulas

Description

utilities for exptracting portions of formulas.

Usage

parse.formula(formula, ...)
rhs(x, ...)
lhs(x, ...)
condition(x, ...)
operator(x, ...)
## S3 method for class 'formula':
rhs(x, ...)
## S3 method for class 'formula':
lhs(x, ...)
## S3 method for class 'formula':
condition(x, ...)
## S3 method for class 'formula':
operator(x, ...)
## S3 method for class 'parsedFormula':
rhs(x, ...)
## S3 method for class 'parsedFormula':
lhs(x, ...)
## S3 method for class 'parsedFormula':
operator(x, ...)
## S3 method for class 'parsedFormula':
condition(x, ...)

Arguments

formula,

a formula

...

additional arguments, current ignored

x,

an object (currently a formula or parsedFormula)

Value

• an object of class parsedFormula from which information is easy to extract

Details

currently this is primarily concerned with extracting the operator, left hand side, right hand side (minus any condition) and the condition. Improvements/extensions may come in the future.