I think (but I didn't follow what you're trying to do and what is what)
that it means the whole matrix (tm) except the first column (therefore
the "-" sign)
Ivan
Le 3/11/2010 12:22, ManInMoon a écrit :
This does what I was hoping it would:
aggregate(tm[,-1],by=list(tm[,10]),FUN="mean")
but I don't know what "tm[,-1]" means (well - the -1 bit anyway.
Does it somehow means the whole matrix?
Please don't tell me to check the manual - I tried and failed dismally...
--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
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