pointmap               package:splancs               R Documentation

_G_r_a_p_h_i_c_s

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

     Plots point and polygon data sets on the current graphics device.

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

     pointmap(pts,add=FALSE,axes=TRUE,xlab="",ylab="", asp,...)

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

     pts: a points data set. 

     add: if FALSE, start a new plot. If TRUE, superimpose on current
          plot. 

    axes: if true, display axes with labelling. If false, do not
          display any  axes on the plot. 

xlab,ylab: Label strings for x and y axes. 

     asp: aspect parameter for plot

     ...: Graphical arguments may be entered, and these are passed to
          the standard S 'points' and 'polygon' routines.

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

     The specified data set is plotted on the current graphics device,
     either as points or polygons. For 'polymap', the last point in the
     data set is drawn connected to the first point. 'pointmap' and
     'polymap' preserve the aspect ratio in the data by using the
     'asp=1' plot argument. Graphical parameters can also be supplied
     to these routines, and are passed  through to 'plot'. Some useful
     parameters include 'pch' to change the plotting character for
     points, 'lty' to change the line type for polygons, and 
     'type="n"' to set up axes for the plot without plotting anything.

_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:

     'mpoint'

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

     data(bodmin)
     plot(bodmin$poly, asp=1, type="n")
     pointmap(as.points(bodmin), add=TRUE)
     polymap(bodmin$poly, add=TRUE)

