Jakub,

One must have one "grouping" vector for each classification applied, you just have to build these new grouping variables (based on your env. variables.) in a spreadsheet or directly in R code, maybe using the "split" function, see ?split

Andrés

Jakub Szymkowiak <qbaszym@tlen.pl> escribió:

> Hello,
> I have a problem and I don't know how can I solve it.
> I have one grouping variable (16 regions in my country). Every region 
> is described by several environmental variables, in example arable 
> fields area, woodland area or meadows area.
> I want to group this regions to small number of groups so that, the 
> similar regions (in terms of my environmental variables) will be in 
> the same group.
> Any cues, how can I solve this?
>
> Cheers,
> Jakub
>
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-- 
Andrés Mellado Díaz

Centre for Hydrological Studies CEH-CEDEX
Water Quality Department
Pº bajo de la Virgen del Puerto, 3
28005, Madrid
SPAIN
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