x.vars: Extract the input attribute names from a formula for a...

In 42n4/dmr.util: A package with utility functions used in the book Cichosz, P. (2015): Data Mining Algorithms: Explained Using R

Description

This function extracts the input attribute names from an R formula for a given dataset. It is used in examples presented in the book Cichosz, P. (2015): Data Mining Algorithms: Explained Using R. See Appendix B or http://www.wiley.com/go/data_mining_algorithms for more details.

Usage

x.vars(formula, data)

Arguments

formula	a formula for R modeling functions
data	a dataframe

Details

The names of all columns of data that are used as input attributes according to formula are extracted.

Value

A character vector containing the input attribute names from formula.

Author(s)

Pawel Cichosz <[e-mail]>

See Also

y.var, make.formula

Examples

data(weather, package="dmr.data")

x.vars(play~outlook+temperature, weather)
x.vars(play~., weather)

42n4/dmr.util documentation built on May 20, 2019, 2:02 p.m.