ridrec                 package:Rwave                 R Documentation

_R_e_c_o_n_s_t_r_u_c_t_i_o_n _f_r_o_m _a _R_i_d_g_e

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

     Reconstructs signal from sample of a ridge, in the wavelet case.

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

     ridrec(cwtinput, node, phinode, noct, nvoice, Qinv, epsilon, np,
     w0=2 * pi, check=F, real=F)

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

cwtinput: wavelet transform, output of `cwt'. 

    node: time coordinates of the ridge samples. 

 phinode: scale coordinates of the ridge samples. 

    noct: number of octaves (powers of 2). 

  nvoice: number of different scales per octave. 

    Qinv: inverse of the matrix Q of the quadratic form. 

 epsilon: coefficient of the Q_2 term in reconstruction kernel 

      np: number of samples of the reconstructed signal. 

      w0: central frequency of Morlet wavelet. 

   check: if set to T, computes `cwt' of reconstructed signal. 

    real: if set to T, uses only constraints on the real part of the
          transform. 

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

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

     Returns a list containing the reconstructed signal and the chained
     ridges. 

     sol: reconstruction from a ridge

       A: <wavelets,dualwavelets> matrix 

     lam: coefficients of dual wavelets in reconstructed signal.

dualwave: array containing the dual wavelets.

morvelets: array of morlet wavelets located on the ridge samples.

 solskel: wavelet transform of sol, restricted to the ridge

inputskel: wavelet transform of signal, restricted to the ridge

_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:

     `sridrec', `regrec', `regrec2'.

