dcard               package:CircStats               R Documentation

_C_a_r_d_i_o_i_d _D_e_n_s_i_t_y _F_u_n_c_t_i_o_n

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

     Returns the cardoid density function evaluated at a particular
     value.

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

     dcard(theta, mu, r)

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

   theta: vector of angles measured in radians at which to evaluate the
          density function.

      mu: mean direction of the distribution.

       r: concentration parameter of the distribution.  Absolute value
          of r must be less than 0.5.

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

     Returns the cardoid density function evaluated at theta.

_R_e_f_e_r_e_n_c_e_s:

     Jammalamadaka, S. Rao and SenGupta, A. (2001). Topics in Circular
     Statistics, Section 2.2.2, World Scientific Press, Singapore.

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

     rcard

