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adviser
2006 Dec 07
2
Splitting a dataframe at the results of tapply
...ing the rows with the maximum Noise for each Id and in the second
the other rows.
I manage to find that maximum Noise levels...
> m <- tapply(df$Noise, Id.factor, max)
> m
1 2 3 4 5 6
102 98 97 103 97 92
But how do I split my dataframe?
--
Ed Gordijn
Adviseur geluidscapaciteit
Amsterdam Airport Schiphol
Business Area Aviation (A/CAP/EC)
Postbus 7501, 1118 ZG Schiphol
Bezoekadres: Evert v/d Beekstraat 202, 1118 CP Schiphol
tel 020 601 32 22
fax 020 601 21 34
e-mail gordijn_e@schiphol.nl
meer informatie...