[R] Simple (?) subset problem

[Erik Iverson]

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 )
> 
>> XTTable <- xtabs( ~   direction_ , EBSurvey)
> 
>> XTTable
> 
> direction_
> 
> EASTBOUND                                          
> 
>                                                  0 
> 
> WESTBOUND                                          
> 
>                                                  0 
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> Robert Farley
> 
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