Hi,
This could be done using ?gsub()
set.seed(5)
dat1<-data.frame(alk_quant=sample(1:15,6,replace=TRUE),ph_quant=sample(5:9,6,replace=TRUE),tds_quant=sample(10:20,6,replace=TRUE))
names(dat1)<-gsub("(.*)\\_.*","\\1",names(dat1))
head(dat1,2)
# alk ph tds
#1 4 7 13
#2 11 9 16
A.K.
----- Original Message -----
From: Rich Shepard <rshep...@appl-ecosys.com>
To: r-help@r-project.org
Cc:
Sent: Wednesday, December 5, 2012 4:23 PM
Subject: Re: [R] Changing data frame column headings
On Wed, 5 Dec 2012, R. Michael Weylandt wrote:
> Can you be more explicit about your problem?
Michael,
Data frame contains water chemistry data; site, date, parameter, value.
The column names after dcast() are, for example, alk_quant, ph_quant,
tds_quant. I wanted to remove the '_quant' from each column header.
Using names() with a string vector of the new names did not work, so I
specified each one and names() made the changes.
Rich
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and provide commented, minimal, self-contained, reproducible code.
