Perhaps you need
with(workingdata, asin(BEFORE))
or
asin(workingdata$BEFORE)
_____________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
USPS:     P.O.Box 400400    Charlottesville, VA 22904-4400
Parcels:    Room 102        Gilmer Hall
         McCormick Road    Charlottesville, VA 22903
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On Apr 30, 2008, at 4:52 PM, Claire Sheller wrote:

> I have been trying to preform both a bartlett's test and an arcsine
> transformation on some average percentage data. I've tried inputting  
> it
> different ways and I keep getting the same error message:
>
>> head(workingdata)
>   DYAD   BEFORE     AFTER
> 1 BG-FL 4.606772  5.787520
> 2 BG-LL 5.467503  7.847395
> 3 AD-MV 5.333735 11.107380
> 4 MM-FL 5.578708 12.063500
> 5 MM-MV 2.037605  6.415303
> 6 MM-RM 6.158885 11.911080
>> bartlett.test(BEFORE ~ AFTER)
> Error in bartlett.test.default(c(4.606772, 5.467503, 5.333735,  
> 5.578708,  :
>  there must be at least 2 observations in each group
>> asin(BEFORE)
> [1] NaN NaN NaN NaN NaN NaN NaN
> Warning message:
> In asin(BEFORE) : NaNs produced
>
> I'm at a loss here and I would greatly appreciate any guidance that  
> could be
> given me. Thank you!
>
> -- 
> Claire Sheller
> Department of Anthropology
> Tulane University
> New Orleans, LA 70118
> 615-210-9129


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