[R] Simple (?) subset problem
Erik Iverson
iverson at biostat.wisc.edu
Fri Aug 15 00:47:01 CEST 2008
I can't tell exactly what's wrong, just check out the ?str and ?levels
functions for some guidance.
Farley, Robert wrote:
> I can't figure out the syntax I need to get subset to work. I'm trying
> to split my dataframe into two parts. I'm sure this is a simple issue,
> but I'm stumped. I either get all or none of the original "rows".
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>> XTTable <- xtabs( ~ direction_ , SurveyData)
>
>> XTTable
>
> direction_
>
> EASTBOUND
>
> 345
>
> WESTBOUND
>
> 307
>
>> EBSurvey <- subset(SurveyData, direction_ == "EASTBOUND" )
>
>> XTTable <- xtabs( ~ direction_ , EBSurvey)
>
>> XTTable
>
> direction_
>
> EASTBOUND
>
> 0
>
> WESTBOUND
>
> 0
>
>> EBSurvey <- subset(SurveyData, direction_ = "EASTBOUND" )
>
>> XTTable <- xtabs( ~ direction_ , EBSurvey)
>
>> XTTable
>
> direction_
>
> EASTBOUND
>
> 345
>
> WESTBOUND
>
> 307
>
>> EBSurvey <- subset(SurveyData, direction_ == 1 )
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>> XTTable <- xtabs( ~ direction_ , EBSurvey)
>
>> XTTable
>
> direction_
>
> EASTBOUND
>
> 0
>
> WESTBOUND
>
> 0
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> Robert Farley
>
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