In line.
John Kane
Kingston ON Canada
> -----Original Message-----
> From: valkr...@gmail.com
> Sent: Fri, 30 Oct 2015 20:40:03 -0500
> To: istaz...@gmail.com
> Subject: Re: [R] If else
>
> I am trying to change the mydata$sex from character to numeric
Why?
As Ista (mydata$confusingWillCauseProblemsLater) has pointed out this is a
very unusual thing to do in R.
Is there a very specific reason for doing this in your analysis. Otherwise it
may better to leave the coding as NA. Some of the data mungers here may be able
to suggest which is the best strategy in R.
R is 'weird' compared to more mundane stats packages such as SAS or SPSS and
common techniques that one would use with them often are not appropriate in R.
> I want teh out put like
> id sex
> 1 NA 0
> 2 NA 0
> 3 M 1
> 4 F 2
> 5 M 1
> 6 F 2
> 7 F 2
>
> mydata$sex1 <- 0
> if(mydata$sex =="M " ){
> mydata$sex1<-1
> } else {
> mydata$sex1<-2
> }
>
> mydata$sex1
>
> Warning message:In if (mydata$sex == "M ") { :
> the condition has length > 1 and only the first element will be
> used> mydata$sex1[1] 2 2 2 2 2 2 2 2
>
>>
>
>
> On Fri, Oct 30, 2015 at 8:28 PM, Ista Zahn <istaz...@gmail.com> wrote:
>
>> Using numeric for missing sounds like asking for trouble. But if you
>> must, something like
>>
>> mydata$confusingWillCauseProblemsLater <-
>> ifelse(
>> is.na(mydata$sex),
>> 0,
>> as.numeric(factor(mydata$sex,
>> levels = c("M", "F"))))
>>
>> should do it.
>>
>> Best,
>> Ista
>>
>> On Fri, Oct 30, 2015 at 9:15 PM, Val <valkr...@gmail.com> wrote:
>>> Hi all,
>>> Iam trying to change character to numeric but have probelm
>>>
>>> mydata <- read.table(header=TRUE, text=', sep=" "
>>> id sex
>>> 1 NA
>>> 2 NA
>>> 3 M
>>> 4 F
>>> 5 M
>>> 6 F
>>> 7 F
>>> ')
>>>
>>> if sex is missing then sex=0;
>>> if sex is"M" then sex=1;
>>> if sex is"F" then sex=2;
>>>
>>> Any help please ?
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> R-help@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@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.
____________________________________________________________
FREE 3D MARINE AQUARIUM SCREENSAVER - Watch dolphins, sharks & orcas on your
desktop!
______________________________________________
R-help@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.
