On 7/15/2009 10:35 AM, Tom Liptrot wrote:
Hi R helpers,
I have a data frame and I want to change the column names to names I have held
in another data frame, but I am having difficulty. All data framnes are large
so i can't input manually. Below is what i have tried so far:
df<-data.frame(a=1:5, b=2:6, d=3:7, e=4:8)
coltitles<-data.frame(v1="col number one", v2="col number two", v3="col number three",
v4="col number four")
It would be simpler to use
coltitles <- c((v1="col number one", v2="col number two", v3="col number
three", v4="col number four")
(and the v1=, v2=, etc. are redundant). Then your first attempt would work.
##first attempt
names(df)<-coltitles
names(df)
[1] "1" "1" "1" "1" ###not what i wanted as I want names(df) to return [1] "col number one" "col
number two" "col number three" "col number four"
If you are taking titles from one data frame to put on another as in
your original code, then use
names(df) <- names(coltitles)
Duncan Murdoch
##second attempt
coltitles<-as.vector(coltitles, mode="character") ##trying to convert to a
character vector after looking at help
is.vector(coltitles)
[1] TRUE
names(df)<-coltitles
names(df)
[1] "1" "1" "1" "1" ###again not what I wanted
How can I convert the column names?
Thanks in advance,
Tom
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