bin2                   package:ash                   R Documentation

_2_D _b_i_n_n_i_n_g

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

     Bin bivariate data x

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

     bin2(x, ab, nbin)

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

       x: (input matrix with 2 columns) data sample 

      ab: (input 2 x 2 matrix) rows 1 and 2 contain x and y axis bin
          intervals, respectively.  If not specified, the ranges are
          stretched by 5% at each end for each dimension. 

    nbin: (input vector of length 2) number of bins along x and y axes.
          Default is 20 by 20.  

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

     `bin2' returns a list including the bivariate bin matrix  and the
     number of points outside the ab rectangle.

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

     `ash2'

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

     x <- matrix( rnorm(200), 100 , 2)       # bivariate normal n=100
     ab <- matrix( c(-5,-5,5,5), 2, 2)       # interval [-5,5) x [-5,5)
     nbin <- c( 20, 20)                      # 400 bins
     bins <- bin2(x, ab, nbin)               # bin counts,ab,nskip

