Thomas Preuth wrote: > Hello, > > I use an imported dataframe and want to extract the mean value for one > column. > after typing "mean (rae.df$VOL_DEP)" I receive > "[1] NA > Warning message: > Argument ist weder numerisch noch boolesch: gebe NA zurück in: > mean.default("rae.df$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 > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html