[R] problems with simple statistical procedures

From: Thomas Preuth <thomaspreuth_at_web.de>
Date: Sun 02 Jul 2006 - 17:57:02 EST


I use an imported dataframe and want to extract the mean value for one column.
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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