rename.vars: Remove or rename variables in a dataframe

Description Usage Arguments Value Author(s) See Also Examples

View source: R/rename.vars.R

Description

Remove or rename a variables in a data frame.

Usage

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rename.vars(data, from="", to="", info=TRUE)
remove.vars(data, names="", info=TRUE)

Arguments

data

dataframe to be modified.

from

character vector containing the current name of each variable to be renamed.

to

character vector containing the new name of each variable to be renamed.

names

character vector containing the names of variables to be removed.

info

boolean value indicating whether to print details of the removal/renaming. Defaults to TRUE.

Value

The updated data frame with variables listed in from renamed to the corresponding element of to.

Author(s)

Code by Don MacQueen macq\@llnl.gov. Documentation by Gregory R. Warnes [email protected]

See Also

names, colnames, data.frame

Examples

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data <- data.frame(x=1:10,y=1:10,z=1:10)
names(data)
data <- rename.vars(data, c("x","y","z"), c("first","second","third"))
names(data)

data <- remove.vars(data, "second")
names(data)

Example output

sh: 1: cannot create /dev/null: Permission denied
gdata: Unable to locate valid perl interpreter
gdata: 
gdata: read.xls() will be unable to read Excel XLS and XLSX files
gdata: unless the 'perl=' argument is used to specify the location of a
gdata: valid perl intrpreter.
gdata: 
gdata: (To avoid display of this message in the future, please ensure
gdata: perl is installed and available on the executable search path.)
sh: 1: cannot create /dev/null: Permission denied
gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLX' (Excel 97-2004) files.

gdata: Unable to load perl libaries needed by read.xls()
gdata: to support 'XLSX' (Excel 2007+) files.

gdata: Run the function 'installXLSXsupport()'
gdata: to automatically download and install the perl
gdata: libaries needed to support Excel XLS and XLSX formats.

Attaching package: 'gdata'

The following object is masked from 'package:stats':

    nobs

The following object is masked from 'package:utils':

    object.size

The following object is masked from 'package:base':

    startsWith

[1] "x" "y" "z"

Changing in data                        
From: x     y      z    
To:   first second third

[1] "first"  "second" "third" 
Removing variable 'second'
[1] "first" "third"

gdata documentation built on June 6, 2017, 3 a.m.