R: Split Data Frame String Column Into Multiple Columns

SplitToCol {DescTools} | R Documentation

## Split Data Frame String Column Into Multiple Columns

### Description

Splitting the string columns of a data frame into multiple columns requires a considerable number of codelines, which are condensed in this function for convenience.

### Usage

    SplitToCol(x, split = " ", fixed = TRUE, na.form = "", colnames = NULL)

### Arguments

`x` | a data frame containing the string columns to be splitted.
`split` | character vector (or object which can be coerced to such) containing regular expression(s) (unless `fixed = TRUE`) to use for splitting. If empty matches occur, in particular if `split` has length 0, `x` is split into single characters. If `split` has length greater than 1, it is re-cycled along `x`.
`fixed` | logical. If `TRUE` match `split` exactly, otherwise use regular expressions. Has priority over `perl`.
`na.form` | character, string specifying how `NAs` should be specially formatted. Default is a blank `""`.
`colnames` | columnnames for the resulting data.frame. Will be recycled. Can easily be set to `""` if no columnnames should be set.

### Value

A data.frame with all the columns splitted

A vector with the length of the number of columns of the data.frame containing the number of the found columns is returned as attribute namede `"ncols"`.

### Author(s)

Andri Signorell <andri@signorell.net>

### See Also

`strsplit`

### Examples

    d.frm <- data.frame(res1=c("2 [-3,5] **", "5 [-2,6] ***", "9 [-3,1]"),
                        res2=c("5 [6,8] **", "7 [-2,9]", "4 [3,5] **"),
                        stringsAsFactors=FALSE)

    SplitToCol(d.frm, na.form="-", colnames=c("coef", "ci", "pval"))

[Package DescTools version 0.99.38 Index]