[R] Odp: Tapply.

Hi r-help-boun...@r-project.org napsal dne 26.04.2010 06:52:55: Having some difficulties with understanding how tapply works and getting return values I expect Data: dataframe. DF DF$Id $D $Year... Id D Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov

[R] Odp: tapply, mean and subset

Hi [EMAIL PROTECTED] napsal dne 13.11.2007 10:59:09: Dear list, I have this dataframe V1 V2 F1 1 A 2 0 2 A 3 0 3 A 4 1 4 B 3 0 5 B 2 1 6 C 6 0 7 C 2 0 8 C 6 0 and would like to calculate a new column with mean-values, following this rule 1. If F1