zplane                package:signal                R Documentation

_P_o_l_e-_z_e_r_o _p_l_o_t

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

     Plot the poles and zeros of a model or filter.

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

     ## Default S3 method:
     zplane(filt, a, ...)

     ## S3 method for class 'Arma':
     zplane(filt, ...)

     ## S3 method for class 'Ma':
     zplane(filt, ...)

     ## S3 method for class 'Zpg':
     zplane(filt, ...)

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

    filt: for the default case, the moving-average coefficients of an
          ARMA model or filter. Generically, 'filt' specifies an
          arbitrary model or filter operation.

       a: the autoregressive (recursive) coefficients of an ARMA
          filter. 

     ...: Additional arguments passed to 'plot'. 

_D_e_t_a_i_l_s:

     Poles are marked with an `x', and zeros are marked with an `o'.

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

     No value is returned.

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

     Tom Short

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

     Octave Forge <URL: http://octave.sf.net>

     <URL: http://en.wikipedia.org/wiki/Pole-zero_plot>

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

     'Arma', 'freqz'

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

     filt <- ellip(5, 0.5, 20, .2)
     zplane(filt)

