Thomas Preuth wrote:> Hello,
>
> I use an imported dataframe and want to extract the mean value for one
> column.
> after typing "mean (rae.df$VOL_DEP)" I receive
> "[1] NA
> Warning message:
> Argument ist weder numerisch noch boolesch: gebe NA zur?ck in:
> mean.default("rae.df$POINT_Y_CH") "
Well,
rae.df$VOL_DEP != "rae.df$POINT_Y_CH"
I think this is really strange. Are you sure this is the exact call and
its output? If so, please tell us the output of
str(rae.df)
Uwe Ligges
> 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.
>
> Greetings,
> thomas
>
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