Re: [R] Factor function for coded numerical values

2012-11-29 Thread PIKAL Petr
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 question says

Re: [R] Factor function for coded numerical values

2012-11-26 Thread maths123
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

Re: [R] Factor function for coded numerical values

2012-11-23 Thread Milan Bouchet-Valat
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 also

[R] Factor function for coded numerical values

2012-11-22 Thread maths123
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

2011-04-26 Thread Petr PIKAL
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 NA d[d[,3]==NA,3]-NA If you want drop any unused levels of a factor just use factor(d[,3]) [1] xx yy NA Levels: xx yy Regards Petr r-help-boun...@r-project.org napsal

Re: [R] Factor function

2011-04-26 Thread Lisa
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

Re: [R] Factor function

2011-04-26 Thread Petr Savicky
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 NA d[d[,3]==NA,3]-NA If you want drop any unused levels of a factor just use factor(d[,3]) [1] xx

Re: [R] Factor function

2011-04-26 Thread peter dalgaard
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 NA d[d[,3]==NA,3]-NA If you want drop any unused

[R] Factor function

2011-04-25 Thread Lisa
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 problem? Thanks in

Re: [R] Factor function

2011-04-25 Thread Ista Zahn
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 lisa...@gmail.com wrote: Dear All, I just want to remove “NA” from the levels of a factor.  For example:

Re: [R] Factor function

2011-04-25 Thread Lisa
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

Re: [R] Factor function

2011-04-25 Thread Ista Zahn
Yes... did you understand that NA is not equal to NA? Best, Ista On Mon, Apr 25, 2011 at 4:31 PM, Lisa lisa...@gmail.com 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

Re: [R] Factor function

2011-04-25 Thread Lisa
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

Re: [R] Factor function

2011-04-25 Thread Petr Savicky
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: NA xx yy But “NA” is still

Re: [R] Factor function

2011-04-25 Thread Lisa
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