Peter Ehlers ehlers at ucalgary.ca
Tue Jun 15 04:47:11 CEST 2010

On 2010-06-14 13:25, Moimt wrote:
> HI,
> I am a new user of R and want to analyse some data using npmc. My data have
> several levels of factor (Site, Year and Season) and several variable
> (Percentages).
> I have tried to use npmc but I always get an error message. My data are in a
> table following this example:
> Site    YEar    Season    Var1     Var2   ....
> A       2009    Dry          10        56
> B   ........
> here is the error message I get: Erreur dans as.vector(x, mode) : argument
> 'mode' incorrect.
> How should I use the npmc formula?
> Thank you for your help

What do you mean by "data are in a table"?
Is this a data.frame (as required by npmc)?

I think that npmc can only handle one numerical and
one categorical variable and they must be named "var"
and "class".

   -Peter Ehlers

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