Grep function

Finds elements in vector or column-names in data.frame/matrix

Pattern matching in a vector or column names of a data.frame or matrix.

Grep(x, pattern, subset = TRUE, ignore.case = TRUE, ...)

Arguments

• x: vector, matrix or data.frame.
• pattern: regular expression to search for
• subset: If TRUE returns subset of data.frame/matrix otherwise just the matching column names
• ignore.case: Default ignore case
• ...: Additional arguments to 'grep'

Returns

A data.frame with 2 columns with the indices in the first and the matching names in the second.

Examples

data(iris)
head(Grep(iris,"(len)|(sp)"))

See Also

grep, and agrep for approximate string matching,

Author(s)

Klaus K. Holst