Displaying 1 result from an estimated 1 matches for "stems353abco1".
2011 Feb 25
4
means, SD's and tapply
...seem to work
> tapply(stems353$Stems, stems353$Species, stems353$SizeClass,
stems353$Time, mean)
Error in match.fun(FUN) :
'stems353$SizeClass' is not a function, character or symbol
I've already created proper subsets for each of these groups, e.g. one
subset is called "stems353ABCO1" and I can run analyses on this. But,
trying to extract means straight from those subsets doesn't seem to work
> mean(stems353ABCO1)
[1] NA
Warning message:
In mean.default(stems353ABCO1) :
argument is not numeric or logical: returning NA
>
Thanks,
Chris Dolanc
--
Christop...