Chris, Something like this should do the job:
1. rowSums(xtabs(~ ECO_NAME + Genus, x) > 0) 2. rowSums(xtabs(~ ECO_NAME + Genus, x)) Cheers, Peter On Fri, May 20, 2011 at 3:19 PM, Chris Mcowen <[email protected]> wrote: > Dear List, > > I am looking to calculate two things from my data frame and was after some > advice. For the example below i want to know. > > 1. How many unique Orders/Families and Genera there are per eco-name > > 2. How many incidences are there for each Order/Family and Genus there are > per eco-region > > I have 650 econame. > > I.e for Biak-Numfoor rain forests there are 2 orders, 2 families and two > genera. Also, Alismatales are represented once, Asparagales once etc etc. > > Thanks for any advice. > > Chris > > > ECO_NAME Order > Family Genus > Biak-Numfoor rain forests Alismatales > Araceae Homalomena > Biak-Numfoor rain forests Asparagales > Orchidaceae Bromheadia > Central Range montane rain forests Alismatales Araceae > Homalomena > Central Range montane rain forests Asparagales Lomandraceae > Cordyline > Central Range montane rain forests Asparagales Orchidaceae > Thelymitra > Central Range montane rain forests Asparagales Orchidaceae > Dendrobium > Central Range montane rain forests Asparagales Orchidaceae > Vanda > Central Range montane rain forests Asparagales Orchidaceae > Bulbophyllum > Central Range montane rain forests Asparagales Orchidaceae > Bulbophyllum > Central Range montane rain forests Asparagales Orchidaceae > Dendrobium > Central Range montane rain forests Asparagales Orchidaceae > Dendrobium > Central Range montane rain forests Commelinales Commelinaceae > Murdannia > Central Range montane rain forests Poales > Centrolepidaceae Centrolepis > Central Range montane rain forests Poales Cyperaceae > Machaerina > Central Range montane rain forests Poales Cyperaceae > Eleocharis > Central Range montane rain forests Poales Eriocaulaceae > Eriocaulon > Central Range montane rain forests Poales Poaceae > Schizostachyum > Central Range montane rain forests Poales Poaceae > Poa > Central Range montane rain forests Zingiberales Zingiberaceae > Alpinia > Central Range montane rain forests Zingiberales Zingiberaceae > Curcuma > Central Range montane rain forests Zingiberales Zingiberaceae > Amomum > Huon Peninsula montane rain forests Asparagales Orchidaceae > Taeniophyllum > Huon Peninsula montane rain forests Asparagales Orchidaceae > Corybas > Huon Peninsula montane rain forests Asparagales Orchidaceae > Thelymitra > Huon Peninsula montane rain forests Asparagales Orchidaceae > Glomera > Huon Peninsula montane rain forests Poales > Centrolepidaceae Centrolepis > Huon Peninsula montane rain forests Poales Poaceae > Poa > > _______________________________________________ > R-sig-ecology mailing list > [email protected] > https://stat.ethz.ch/mailman/listinfo/r-sig-ecology > > _______________________________________________ R-sig-ecology mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
