r - Vegan pkg - diversity for (cover) data per row -


i'm trying calculate simpson's diversity() index different species (column headings) need compare indices between 2 treatments. have treatments in rows , species in columns:

         treatment  plot pinus abies           <chr>    <int> <dbl> <dbl> 1        control     1  0.54  0.01 2        logging     2  0.02  0.09

is there way this? examples i've found have species in columns (dune, bci). help.


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