qreference               package:DAAG               R Documentation

_N_o_r_m_a_l _Q_Q _R_e_f_e_r_e_n_c_e _P_l_o_t

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

     This function computes the normal QQ plot for given data and
     allows for comparison with normal QQ plots of simulated data.

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

     qreference(test=NULL, mu = 10, sigma = 1, m = 50, nrep = 5,
                  seed=NULL, nrows=NULL, cex.points=0.65, cex.strip=0.75)

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

    test: a vector containing a sample to be tested

      mu: the mean of the simulated reference samples

   sigma: the standard deviation of the reference samples

       m: the sample size for the reference samples; default is test
          sample size if test sample is supplied

    nrep: the total number of samples, including reference samples and
          test sample if any

    seed: the random number generator seed

   nrows: number of rows in the plot layout

cex.points: character expansion factor for plotted points

cex.strip: character expansion factor for labels

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

     QQ plots of the sample (if non-null) and all reference samples

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

     J.H. Maindonald

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

     qreference(rt(180,1))

     qreference(rexp(180), nrep = 4)

     data(toycars)
     toycars.lm <- lm(distance ~ angle + factor(car), data = toycars)
     qreference(residuals(toycars.lm), nrep = 9)

