R: strsplit and transpose the resulting list efficiently

tstrsplit {data.table}

R Documentation

strsplit and transpose the resulting list efficiently

Description

This is equivalent to transpose(strsplit(...)). This is a convenient wrapper function to split a column using strsplit and assign the transposed result to individual columns. See examples.

Usage

tstrsplit(x, ..., fill=NA, type.convert=FALSE)

Arguments

`x`	The vector to split (and transpose).
`...`	All the arguments to be passed to `strsplit`.
`fill`	Default is `NA`. It is used to fill shorter list elements so as to return each element of the transposed result of equal lengths.
`type.convert`	`TRUE` calls `type.convert` with `as.is=TRUE` on the columns.

Details

It internally calls strsplit first, and then transpose on the result.

Value

A transposed list.

Examples

x = c("abcde", "ghij", "klmnopq")
strsplit(x, "", fixed=TRUE)
tstrsplit(x, "", fixed=TRUE)
tstrsplit(x, "", fixed=TRUE, fill="<NA>")

DT = data.table(x=c("A/B", "A", "B"), y=1:3)
DT[, c("c1", "c2") := tstrsplit(x, "/", fixed=TRUE)][]

[Package data.table version 1.9.6 Index]