Message-ID: <45825588.90101@fz-rossendorf.de>
Date: 2006-12-15T07:58:00Z
From: Joerg van den Hoff
Subject: Better way to change the name of a column in a dataframe?
In-Reply-To: <CA612484A337C6479EA341DF9EEE14AC05B7CDB5@hercules.ssainfo>
Ben Fairbank wrote:
> Hello R users --
>
>
>
> If I have a dataframe such as the following, named "frame" with the
> columns intended to be named col1 through col6,
>
>
>
>> frame
>
> col1 col2 cmlo3 col4 col5 col6
>
> [1,] 3 10 2 6 5 7
>
> [2,] 6 8 4 10 7 1
>
> [3,] 7 5 1 3 1 8
>
> [4,] 10 6 5 4 9 2
>
>
>
> and I want to correct or otherwise change the name of one of the
> columns, I can do so with
>
>
>
>> dimnames(frame)[[2]][which(dimnames(frame)[[2]]=="cmlo3")] <- "col3"
>
>
>
> which renames the offending column:
>
>
>
>> frame
>
> col1 col2 col3 col4 col5 col6
>
> [1,] 3 10 2 6 5 7
>
> [2,] 6 8 4 10 7 1
>
> [3,] 7 5 1 3 1 8
>
> [4,] 10 6 5 4 9 2
>
>
>
> This seems cumbersome and not very intuitive. How can one accomplish
> this more simply?
>
>
well I would simply use
names(frame)[3] = 'col3'
(supposing you know the column number of your offending column anyway).