[R] problems with simple statistical procedures

Thomas Preuth thomaspreuth at web.de
Sun Jul 2 09:57:02 CEST 2006


I use an imported dataframe and want to extract the mean value for one 
after typing "mean (rae.df$VOL_DEP)" I receive
"[1] NA
Warning message:
Argument ist weder numerisch noch boolesch: gebe NA zurück in: 
mean.default("rae.df$POINT_Y_CH") "

But when i look into the dataframe the column is characterized as numeric.

Sorry for bothering but as a complete newbie I just cannot halp myself.


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