make.groups             package:lattice             R Documentation

_G_r_o_u_p_e_d _d_a_t_a _f_r_o_m _m_u_l_t_i_p_l_e _v_e_c_t_o_r_s

_D_e_s_c_r_i_p_t_i_o_n:

     Combines two or more vectors, possibly of different lengths,
     producing a data frame with a second column indicating which of
     these vectors that row came from.  This is mostly useful for
     getting data into a form suitable for use in high level Lattice
     functions.

_U_s_a_g_e:

     make.groups(...)

_A_r_g_u_m_e_n_t_s:

     ...: one or more vectors of the same type (coercion is attempted
          if not) 

_V_a_l_u_e:

     A data frame with two columns 

  'data': all the vectors supplied, concatenated 

 'which': factor indicating which vector the corresponding 'data' value
          came from 

_A_u_t_h_o_r(_s):

     Deepayan Sarkar Deepayan.Sarkar@R-project.org

_S_e_e _A_l_s_o:

     'Lattice'

_E_x_a_m_p_l_e_s:

     sim.dat <-
         make.groups(uniform = runif(200),
                     exponential = rexp(175),
                     lognormal = rlnorm(150),
                     normal = rnorm(125))
     qqmath( ~ data | which, sim.dat, scales = list(y = "free"))

