fsetdiff: Remove common independent variables from formulas.

In vapniks/formula_utils: Macros for manipulating formulas

Usage

fsetdiff(..., asString = FALSE, diffUnion = FALSE)

Arguments

...	Formula objects or strings representing formulas or their right hand sides.
asString	If TRUE then return formula as a string, otherwise as a formula object.
diffUnion	If TRUE then remove from each formula any terms that are in ANY of the other formulas (otherwise only terms that are in ALL of the other formulas are removed).

Details

The first formula/string argument should be either the name of the dependent variable or a formula object or string representation of a formula containing a dependent variable (and a ~). This will be used as the dependent variable of the result. By default any independent variables that are in ALL the formula/string arguments to the function are removed from each of those formulas and the results returned as either a list of formula arguments (asString=FALSE, default), or a character vector of strings representing those formulas (asString=TRUE). If diffUnion==TRUE then instead all independent variables that are in ANY of the formula arguments will be removed.

Value

A formula object or a string representing a formula object.

Author(s)

Ben Veal

vapniks/formula_utils documentation built on May 3, 2019, 4:33 p.m.