panel.qqmathline           package:lattice           R Documentation

_U_s_e_f_u_l _p_a_n_e_l _f_u_n_c_t_i_o_n _w_i_t_h _q_q_m_a_t_h

_D_e_s_c_r_i_p_t_i_o_n:

     Useful panel function with qqmath. Draws a line passing through
     the points (usually) determined by the .25 and .75 quantiles of
     the sample and the theoretical distribution.

_U_s_a_g_e:

     panel.qqmathline(x, y = x,
                      distribution = qnorm,
                      p = c(0.25, 0.75),
                      qtype = 7,
                      groups = NULL, 
                      ...)

_A_r_g_u_m_e_n_t_s:

       x: The original sample, possibly reduced to a fewer number of
          quantiles, as determined by the 'f.value' argument to
          'qqmath' 

       y: an alias for 'x' for backwards compatibility 

distribution: quantile function for reference theoretical distribution. 

       p: numeric vector of length two, representing probabilities.
          Corresponding quantile pairs define the line drawn. 

   qtype: the 'type' of quantile computation used in 'quantile' 

  groups: optional grouping variable.  If non-null, a line will be
          drawn for each group. 

     ...: other arguments.

_A_u_t_h_o_r(_s):

     Deepayan Sarkar Deepayan.Sarkar@R-project.org

_S_e_e _A_l_s_o:

     'prepanel.qqmathline', 'qqmath', 'quantile'

