[R] HELP asin transformation

[CHIRIBOGA Xavier]

Dear all,



I attempted to transform my data using "asin" but a WARNING message appears:



dat1$Abu.tr<-asin(sqrt(dat1$Abundance/100))
Warning message:
In asin(sqrt(dat1$Abundance/100)) : NaNs produced



What does it mean? Is it a problem? How can I solve this?



Thank you!



XAVIER