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, ...)
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' |
A data.frame with 2 columns with the indices in the first and the matching names in the second.
Klaus K. Holst
data(iris) head(Grep(iris,"(len)|(sp)"))
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