Grep for column names from a data.frame

Source: R/grepdf.R

Grep for column names from a data.frame

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)

#> [1] "xa"

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

#> [1] "yb"