[R] sum up breaks

[Ulrich Leopold]

HI,

how can use in the function below instead of ave sum? I would like to sum up 
  breaks.

Pox2 <- data.frame(ave(lsk0t50$Pox2, lsk0t50$ProfN, Fun=is.na(lsk0t50$Pox2)))

Regards, Ulrich
-- 
__________________________________________________

Ulrich Leopold MSc.

Department of Physical Geography
Institute for Biodiversity and Ecosystem Dynamics
Faculty of Science
University of Amsterdam
Nieuwe Achtergracht 166
NL-1018WV Amsterdam

Phone: +31-(0)20-525-7456 (7451 Secretary)
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Email: uleopold at science.uva.nl
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