vegtab                package:labdsv                R Documentation

_V_e_g_e_t_a_t_i_o_n _T_a_b_l_e

_D_e_s_c_r_i_p_t_i_o_n:

     Produces an ordered table of abundance of species in samples,
     subsampled by (an optional) classification of the samples

_U_s_a_g_e:

     vegtab(taxa,set,minval=1,pltord,spcord,pltlbl,trans=FALSE)

_A_r_g_u_m_e_n_t_s:

    taxa: a vegetation (or other taxon) data.frame 

     set: a logical variable specifying which samples to include

  minval: a minimum abundance threshold to include in the table

  pltord: a numeric vector specifying the order of rows in the output

  spcord: a numeric vector specifying the order of columns in the
          output

  pltlbl: a vector specifying an alternative row label (must be
          unique!)

   trans: a logical variable to control transposing the table

_D_e_t_a_i_l_s:

     Subsets a vegetation data.frame according to specified plots or
     minimum species abundances, optionally ordering in arbitrary
     order.

_V_a_l_u_e:

     a data.frame with specified rows, columns, and row.names)

_N_o_t_e:

     Vegetation tables are a common tool in vegetation analysis.  In
     recent years analysis has tended to become more quantitative, and
     less oriented to sorted tables, but even still presenting the
     results from these analyses often involves a sorted vegetation
     table.

_A_u_t_h_o_r(_s):

     David W. Roberts droberts@montana.edu <URL:
     http://ecology.msu.montana.edu/droberts>

_R_e_f_e_r_e_n_c_e_s:

     <URL: http://ecology.msu.montana.edu/labdsv/R>

_S_e_e _A_l_s_o:

     'vegemite'

_E_x_a_m_p_l_e_s:

         data(bryceveg) # returns a vegetation data frame called bryceveg
         data(brycesite) # returns an environmental data frame called brycesite
         vegtab(bryceveg,minval=10,pltord=brycesite$elev) 
             # produces a sorted table for species whose abundance sums 
             # to 10, with rows in order of elevation.

