Displaying 1 result from an estimated 1 matches for "slp_jeo2".
2007 Apr 24
2
problem in tapply command
hello
when I entered following command, I got NA values for some catagories.
> tapply(slp_jeo2$slp,slp_jeo2$jeo,mean )
999 Ca Cka DCy Jh JKi Kk
14.06665 NA 14.60445 NA NA NA NA NA
KTa KTac Ku Kua Kus Ky Kyk ODe
NA NA NA NA NA NA...