Dear expert friends,
I'm pretty young of this world and my question at your eyes can be petty
easy.
I'll need to change the name of the levels inside a column of my data-frame
levels(ind.davis$Ageclass) <- c("adult", "Juvanile",
"sub-adult")
names(ind.davis$Ageclass) <- c("Adult", "Juvenile",
"Sub-adult")
that is what I tried but of course doesn't work.
Thanks,
have a wonderful day,
Leo
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Leonardo-- R-help can be a very useful resource. Some suggestions to use it well: 1. use an informative subject line, not "help" 2. include a "minimal working example:" a *little* data, the code that, with those data, reproduces your problem, and the error message that resulted. As to your particular question, at this point I can only guess, but for starters it would probably help to show the output of str(ind.davis) --Chris Ryan On Tue, Jun 20, 2017 at 1:06 AM, Leonardo Malaguti < leonardomalaguti27 at gmail.com> wrote:> Dear expert friends, > I'm pretty young of this world and my question at your eyes can be petty > easy. > I'll need to change the name of the levels inside a column of my data-frame > > levels(ind.davis$Ageclass) <- c("adult", "Juvanile", "sub-adult") > names(ind.davis$Ageclass) <- c("Adult", "Juvenile", "Sub-adult") > that is what I tried but of course doesn't work. > > Thanks, > have a wonderful day, > Leo > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/ > posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]]
One solution, among many, involving recoding. There is a function in package QCA called recode() (similar, but in my opinion more flexible than the same function recode() in package car)> library(QCA) > ind.davis$Ageclass <- recode(ind.davis$Ageclass, "adult = Adult; Juvanile= Juvenile; sub-adult = Sub-adult", as.factor.result = TRUE) Should work, although untested (your example is not replicable). Hope this helps, Adrian On Tue, Jun 20, 2017 at 8:06 AM, Leonardo Malaguti < leonardomalaguti27 at gmail.com> wrote:> Dear expert friends, > I'm pretty young of this world and my question at your eyes can be petty > easy. > I'll need to change the name of the levels inside a column of my data-frame > > levels(ind.davis$Ageclass) <- c("adult", "Juvanile", "sub-adult") > names(ind.davis$Ageclass) <- c("Adult", "Juvenile", "Sub-adult") > that is what I tried but of course doesn't work. > > Thanks, > have a wonderful day, > Leo > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/ > posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- Adrian Dusa University of Bucharest Romanian Social Data Archive Soseaua Panduri nr. 90-92 050663 Bucharest sector 5 Romania [[alternative HTML version deleted]]
As Chris points out, we do not know what the factor labels were before you tried to change them. The levels() function should have worked as long as it included all of the factor levels in the same order. The names() function lists the names of an object. For a data frame that is the column headings. Vectors like ind.davis$Ageclass do not have names:> set.seed(42) # Create some random data > ind.davis <- data.frame(ID=1:10, Ageclass=sample(c("A", "J", "S"), 10, replace=TRUE)) > str(ind.davis)'data.frame': 10 obs. of 2 variables: $ ID : int 1 2 3 4 5 6 7 8 9 10 $ Ageclass: Factor w/ 3 levels "A","J","S": 3 3 1 3 2 2 3 1 2 3> levels(ind.davis$Ageclass)[1] "A" "J" "S"> names(ind.davis$Ageclass)NULL> names(ind.davis)[1] "ID" "Ageclass"> levels(ind.davis$Ageclass) <- c("Adult", "Juvenile", "Sub-adult") > levels(ind.davis$Ageclass)[1] "Adult" "Juvenile" "Sub-adult"> str(ind.davis)'data.frame': 10 obs. of 2 variables: $ ID : int 1 2 3 4 5 6 7 8 9 10 $ Ageclass: Factor w/ 3 levels "Adult","Juvenile",..: 3 3 1 3 2 2 3 1 2 3 ------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Christopher W Ryan Sent: Tuesday, June 20, 2017 8:23 AM To: R-help <r-help at r-project.org> Subject: Re: [R] Help Leonardo-- R-help can be a very useful resource. Some suggestions to use it well: 1. use an informative subject line, not "help" 2. include a "minimal working example:" a *little* data, the code that, with those data, reproduces your problem, and the error message that resulted. As to your particular question, at this point I can only guess, but for starters it would probably help to show the output of str(ind.davis) --Chris Ryan On Tue, Jun 20, 2017 at 1:06 AM, Leonardo Malaguti < leonardomalaguti27 at gmail.com> wrote:> Dear expert friends, > I'm pretty young of this world and my question at your eyes can be petty > easy. > I'll need to change the name of the levels inside a column of my data-frame > > levels(ind.davis$Ageclass) <- c("adult", "Juvanile", "sub-adult") > names(ind.davis$Ageclass) <- c("Adult", "Juvenile", "Sub-adult") > that is what I tried but of course doesn't work. > > Thanks, > have a wonderful day, > Leo > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/ > posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]] ______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.