cfamily                package:Rwave                R Documentation

_R_i_d_g_e _C_h_a_i_n_i_n_g _P_r_o_c_e_d_u_r_e

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

     Chains the ridge estimates produced by the function `crc'.

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

     cfamily(ccridge, bstep=1, nbchain=100, ptile=0.05)

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

 ccridge: unchained ridge set as the output of the function `crc' 

   bstep: maximal length for a gap in a ridge. 

 nbchain: maximal number of chains produced by the function. 

   ptile: relative threshold for the ridges. 

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

     `crc' returns a measure in time-frequency (or time-scale) space.
     `cfamily' turns it into a series of one-dimensional objects
     (ridges). The measure is first thresholded, with a relative
     threshold value set to the input parameter ptile. During the
     chaining procedure, gaps within a given ridge are allowed and
     filled in. The maximal length of such gaps is the input parameter
     bstep.

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

     Returns the results of the chaining algorithm 

ordered map: image containing the ridges (displayed with different
          colors) 

   chain: 2D array containing the chained ridges, according to the
          chain data structure
          chain[,1]: first point of the ridge
          chain[,2]: length of the chain
          chain[,3:(chain[,2]+2)]: values of the ridge


 nbchain: number of chains produced by the algorithm 

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

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

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

     `crc' for the ridge estimation, and `crcrec', `gcrcrec' and
     `scrcrec' for corresponding reconstruction functions.

