[R] getting a new factor

[Manuel Morales]

On Sun, 2006-12-31 at 00:25 +0100, Ricardo Rodríguez wrote:
> Hi all,
> 
> Given a data frame as...
> 
> > head(veg)
>      genus      species trophia type geo zone importance
> 1 Sphagnum  subsecundum       M        A   En        100
> 2 Sphagnum denticulatum       M        A   En        200
> 3  Molinia     caerulea       M        A   En        300
> 4 Sphagnum    flexuosum       M        A   En        400
> 5   Juncus   squarrosus       M        A   En        500
> 6    Carex     echinata       M        A   En        600
> 
> I do need a new one with a new factor constructed from a concatenation of the two first columns, genus and species. I am guessing this must be a simple matter while working with R, but I am stuck at this point.

veg$genus.species <- paste(veg$genus,veg$species)

will add a new column combining genus and species.


-- 
Manuel A. Morales
http://mutualism.williams.edu
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