kernel-class             package:kernlab             R Documentation

_C_l_a_s_s "_k_e_r_n_e_l" "_r_b_f_k_e_r_n_e_l" "_p_o_l_y_k_e_r_n_e_l", "_t_a_n_h_k_e_r_n_e_l", "_v_a_n_i_l_l_a_k_e_r_n_e_l"

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

     The build in 'kernel' classes in 'kernlab'

_O_b_j_e_c_t_s _f_r_o_m _t_h_e _C_l_a_s_s:

     Objects can be created by calls of the form 'new("rbfkernel")',
     'new{"polykernel"}', 'new{"tanhkernel"}', 'new{"vanillakernel"}',
     'new{"anovakernel"}', 'new{"besselkernel"}',
     'new{"laplacekernel"}', 'new{"splinekernel"}',
     'new{"stringkernel"}'

     or by calling the 'rbfdot', 'polydot', 'tanhdot', 'vanilladot',
     'anovadot', 'besseldot', 'laplacedot', 'splinedot', 'stringdot'
     functions etc..

_S_l_o_t_s:

     '._D_a_t_a': Object of class '"function"' containing the kernel
          function 

     '_k_p_a_r': Object of class '"list"' containing the kernel parameters 

_E_x_t_e_n_d_s:

     Class '"kernel"', directly. Class '"function"', by class
     '"kernel"'.

_M_e_t_h_o_d_s:

     _k_e_r_n_e_l_M_a_t_r_i_x 'signature(kernel = "rbfkernel", x = "matrix")':
          computes the kernel matrix

     _k_e_r_n_e_l_M_u_l_t 'signature(kernel = "rbfkernel", x = "matrix")':
          computes the quadratic kernel expression

     _k_e_r_n_e_l_P_o_l 'signature(kernel = "rbfkernel", x = "matrix")':
          computes the kernel expansion

     _k_e_r_n_e_l_F_a_s_t 'signature(kernel = "rbfkernel", x = "matrix"),,a':
          computes parts or the full kernel matrix, mainly used in
          kernel algorithms where columns of the kernel matrix are
          computed per invocation 

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

     Alexandros Karatzoglou
      alexandros.karatzoglou@ci.tuwien.ac.at

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

     'dots'

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

     rbfkernel <- rbfdot(sigma = 0.1)
     rbfkernel
     is(rbfkernel)
     kpar(rbfkernel)

