tfvar                 package:Rwave                 R Documentation

_V_a_r_i_a_n_c_e _f_r_e_q_u_e_n_c_y _b_y _f_r_e_q_u_e_n_c_y

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

     Compute the variance of time-frequency representation frequency 
     by frequency.

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

     tfvar(input, plot=TRUE)

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

   input: time-frequency transform (output of `cwt' or `cgt'). 

    plot: if set to T, displays the values of the energy as a  function
          of the scale (or frequency). 

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

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

     1D array containing the noise estimate.

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

     See discussions in the text of ``Practical Time-Frequency
     Analysis''.

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

     `tfmean',`tfpct'.

