kerview               package:splancs               R Documentation

_A _l_i_n_k_e_d-_w_i_n_d_o_w _s_y_s_t_e_m _f_o_r _b_r_o_w_s_i_n_g _s_p_a_c_e-_t_i_m_e _d_a_t_a

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

     A linked-window system for browsing space-time data.

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

     kerview(pts, times, k3, map=T, addimg=T, ncol=1)

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

     pts: A matrix of event x,y coordinates. 

   times: A vector of event times. 

      k3: An object returned from `kernel3d', the space-time kernel
          smoothing function 

     map: If false, don't plot the map display. 

  addimg: If true, overwrite successive images in the image display,
          else make a fresh image plot each time. 

    ncol: Number of columns and rows for multiple images and maps. 

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

     This function displays three linked views of the data. In the
     current graphics window a temporal slice from the kernel smoothing
     is displayed.  Another graphics device is started to display a map
     of the data that contributed to that time-slice. A third graphics
     device shows a  histogram of the times of the events. Clicking
     with the mouse in this window with button 1 sets the time for the
     other displays to the time on the x-axis of the histogram at the
     clicked point.

     In this way the 3-dimensional kernel smoothed function can be
     browsed,  and the corresponding map of the data compared.

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

     Rowlingson, B. and Diggle, P. 1993 Splancs: spatial point pattern
     analysis code in S-Plus.  Computers and Geosciences, 19, 627-655;
     the original sources can be accessed at: <URL:
     http://www.maths.lancs.ac.uk/~rowlings/Splancs/>. See also Bivand,
     R. and Gebhardt, A. 2000 Implementing functions for spatial
     statistical analysis using the R language. Journal of Geographical
     Systems, 2, 307-317.

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

     `kernel3d'

