grepdf: Grep for column names from a 'data.frame'

In wrapr: Wrap R Tools for Debugging and Parametric Programming

Description

Grep for column names from a data.frame

Usage

grepdf(
  pattern,
  x,
  ...,
  ignore.case = FALSE,
  perl = FALSE,
  value = FALSE,
  fixed = FALSE,
  useBytes = FALSE,
  invert = FALSE
)

Arguments

pattern	passed to grep
x	data.frame to work with
...	force later arguments to be passed by name
ignore.case	passed to grep
perl	passed to grep
value	passed to grep
fixed	passed to grep
useBytes	passed to grep
invert	passed to grep

Value

column names of x matching grep condition.

See Also

grep, grepv

Examples

d <- data.frame(xa=1, yb=2)

# starts with
grepdf('^x', d)

# ends with
grepdf('b$', d)

wrapr documentation built on Jan. 27, 2022, 1:14 a.m.