power                 package:stats                 R Documentation

_C_r_e_a_t_e _a _P_o_w_e_r _L_i_n_k _O_b_j_e_c_t

_D_e_s_c_r_i_p_t_i_o_n:

     Creates a link object based on the link function eta = mu^lambda.

_U_s_a_g_e:

     power(lambda = 1)

_A_r_g_u_m_e_n_t_s:

  lambda: a real number.

_D_e_t_a_i_l_s:

     If 'lambda' is non-positive, it is taken as zero, and the log link
     is obtained.  The default 'lambda = 1' gives the identity link.

_V_a_l_u_e:

     A list with components 'linkfun', 'linkinv', 'mu.eta', and
     'valideta'. See 'make.link' for information on their meaning.

_R_e_f_e_r_e_n_c_e_s:

     Chambers, J. M. and Hastie, T. J. (1992) _Statistical Models in
     S._ Wadsworth & Brooks/Cole.

_S_e_e _A_l_s_o:

     'make.link', 'family'

     To raise a number to a power, see 'Arithmetic'.

     To calculate the power of a test, see various functions in the 
     'stats' package, e.g., 'power.t.test'.

_E_x_a_m_p_l_e_s:

     power()
     quasi(link=power(1/3))[c("linkfun", "linkinv")]