varlist: Subset variables in data frame

In tomasgreif/woe: Tools to calculate Weight of Evidence (WoE) and Information Value.

Description

Get subset of variables in data frame based on type, regexp pattern and specified exclusions.

Usage

  varlist(df = NULL,
    type = c("numeric", "factor", "character"),
    pattern = "", exclude = NULL)

Arguments

df	Data frame to be used
type	One of "numeric", "factor", "character" or any combination as vector
pattern	Regexp pattern used to filter variables
exclude	List of variables to be excluded

Examples

# All variable starting with cred
varlist(german_data,pattern="^cred")

# All numeric variable
varlist(german_data,type="numeric")

# All factor variable except variable gb and variables starting with c
varlist(german_data,type="factor",exclude=c("gb",varlist(german_data,pattern="^c")))

# Same as previous, only using pattern instead of c()
varlist(german_data,type="factor",exclude=varlist(german_data,pattern="^c|gb"))

# Everything but factors
varlist(german_data,exclude=varlist(german_data,"factor"))

# Use sapply to apply function for variables
sapply(german_data[,varlist(german_data,type="numeric",pattern="credit")], summary)
sapply(german_data[,varlist(german_data,type="numeric",pattern="credit")],
   function (x) length(unique(x)))

tomasgreif/woe documentation built on May 31, 2019, 5:16 p.m.