Re: [R] Factor function for coded numerical values

Hi > -Original Message- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of maths123 > Sent: Monday, November 26, 2012 8:25 PM > To: r-help@r-project.org > Subject: Re: [R] Factor function for coded numerical values > > The

Re: [R] Factor function for coded numerical values

The question says that there is an experiement to investigate the effect on breathing rate when doing different types of exercise with wearing more clothes or less clothes (factor A, coded 1,2). The duration of exercise was 10min, 20min, 30min (factor B, coded 1,2,3). Could you give m anymore hel

Re: [R] Factor function for coded numerical values

Le jeudi 22 novembre 2012 à 13:12 -0800, maths123 a écrit : > I have s data set where 2 of the columns give the coded versions of the > factors A and B. Factor A is coded with 1, 2, 3. Factor B is coded with 1,2. > > How do use the factor function to convert these variables into factors, and > a

[R] Factor function for coded numerical values

I have s data set where 2 of the columns give the coded versions of the factors A and B. Factor A is coded with 1, 2, 3. Factor B is coded with 1,2. How do use the factor function to convert these variables into factors, and also use the labels= command to give them a more informative name?

Re: [R] Factor function

On Apr 26, 2011, at 18:52 , Petr Savicky wrote: > On Tue, Apr 26, 2011 at 10:51:33AM +0200, Petr PIKAL wrote: >> Hi >> >> >> d<-data.frame(matrix(c("ww","ww","xx","yy","ww","yy","xx","yy","NA"), >> ncol=3, byrow=TRUE)) >> >> Change character value "NA" to missing value >> d[d[,3]=="NA",3]<-N

Re: [R] Factor function

On Tue, Apr 26, 2011 at 10:51:33AM +0200, Petr PIKAL wrote: > Hi > > > d<-data.frame(matrix(c("ww","ww","xx","yy","ww","yy","xx","yy","NA"), > ncol=3, byrow=TRUE)) > > Change character value "NA" to missing value > d[d[,3]=="NA",3]<-NA > > If you want drop any unused levels of a factor just u

Re: [R] Factor function

Thank you so much! Lisa -- View this message in context: http://r.789695.n4.nabble.com/Factor-function-tp3473984p3475549.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/li

Re: [R] Factor function

Hi d<-data.frame(matrix(c("ww","ww","xx","yy","ww","yy","xx","yy","NA"), ncol=3, byrow=TRUE)) Change character value "NA" to missing value d[d[,3]=="NA",3]<-NA If you want drop any unused levels of a factor just use factor(d[,3]) [1] xx yy Levels: xx yy Regards Petr r-help-boun...@r-

Re: [R] Factor function

Thank you for your help. Your R code works well. Lisa -- View this message in context: http://r.789695.n4.nabble.com/Factor-function-tp3473984p3474196.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list h

Re: [R] Factor function

On Mon, Apr 25, 2011 at 12:53:40PM -0700, Lisa wrote: > Dear All, > > I just want to remove “NA” from the levels of a factor. For example: > > d<-data.frame(matrix(c("ww","ww","xx","yy","ww","yy","xx","yy","NA"), > ncol=3, byrow=TRUE)) > > > factor(d[, 3], exclude=NA) > [1] xx yy NA > Levels: N

Re: [R] Factor function

Thank you for your reply again. I really know that NA is not "NA". I just want to figure out how to remove "NA" from the levels. Thanks again. -- View this message in context: http://r.789695.n4.nabble.com/Factor-function-tp3473984p3474127.html Sent from the R help mailing list archive at Nabble.

Re: [R] Factor function

Yes... did you understand that NA is not equal to "NA"? Best, Ista On Mon, Apr 25, 2011 at 4:31 PM, Lisa wrote: > Did you see the data frame "d"? Thanks. > > -- > View this message in context: > http://r.789695.n4.nabble.com/Factor-function-tp3473984p3474065.html > Sent from the R help mailing

Re: [R] Factor function

Did you see the data frame "d"? Thanks. -- View this message in context: http://r.789695.n4.nabble.com/Factor-function-tp3473984p3474065.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.eth

Re: [R] Factor function

Hi Lisa, NA != "NA" The first represents a missing observation, the second represents a character string. HTH, Ista On Mon, Apr 25, 2011 at 3:53 PM, Lisa wrote: > Dear All, > > I just want to remove “NA” from the levels of a factor.  For example: > > d<-data.frame(matrix(c("ww","ww","xx","yy"

[R] Factor function

Dear All, I just want to remove “NA” from the levels of a factor. For example: d<-data.frame(matrix(c("ww","ww","xx","yy","ww","yy","xx","yy","NA"), ncol=3, byrow=TRUE)) > factor(d[, 3], exclude=NA) [1] xx yy NA Levels: NA xx yy But “NA” is still listed in the levels. How can I solve this prob