[R] Odp: re ad.table

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 06.04.2009 11:54:27:

> 
> Hi,
> I ve been searching a lot in internet..but I can t find a solution
> Attached, you find a file.
> I need for each (Materiale, tpdv, UM) to find sum,avg and count
> My idea was to aggregate for the 3 parameters ..but I don t know how to 
get
> the numeric value (SUM,COUNT,AVG) I need.

?sum
?mean
?length

Aggregate works with one value only but you can try doBy package or 
split/lapply approach.

Regards
Petr

> Can you help me?
> thank you
> 
> http://www.nabble.com/file/p22905601/ordini2008_ex.txt ordini2008_ex.txt 

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