hatmatrix               package:locfit               R Documentation

_W_e_i_g_h_t _d_i_a_g_r_a_m_s _a_n_d _t_h_e _h_a_t _m_a_t_r_i_x _f_o_r _a _l_o_c_a_l _r_e_g_r_e_s_s_i_o_n _m_o_d_e_l.

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

     'hatmatrix()' computes the weight diagrams (also known as
     equivalent or effective kernels) for a local regression smooth.
     Essentially, 'hatmatrix()' is a front-end to 'locfit()', setting a
     flag to compute and return weight diagrams, rather than the fit.

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

     hatmatrix(formula, dc, ...)

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

 formula: model formula. 

      dc: Derivative adjustment (to be passed to 'locfit.raw'.

     ...: Other arguments to 'locfit' and 'locfit.raw'. 

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

     A matrix with n rows and p columns; each column being the weight
     diagram for the corresponding 'locfit' fit point. If 'ev="data"',
     this is the transpose of the hat matrix.

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

     'locfit', 'plot.locfit.1d', 'plot.locfit.2d', 'plot.locfit.3d',
     'lines.locfit', 'predict.locfit'

