afcon                 package:spdep                 R Documentation

_S_p_a_t_i_a_l _p_a_t_t_e_r_n_s _o_f _c_o_n_f_l_i_c_t _i_n _A_f_r_i_c_a _1_9_6_6-_7_8

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

     The 'afcon' data frame has 42 rows and 5 columns, for 42 African
     countries, exclusing then South West Africa and Spanish Equatorial
     Africa and Spanish Sahara. The dataset is used in Anselin (1995),
     and downloaded from  before adaptation. The neighbour list object
     'africa.rook.nb' is the SpaceStat 'rook.GAL', but is not the list
     used in Anselin (1995) - 'paper.nb' reconstructs the list used in
     the paper, with inserted links between Mauritania and Morocco,
     South Africa and Angola and Zambia, Tanzania and Zaire, and
     Botswana and Zambia. 'afxy' is the coordinate matrix for the
     centroids of the countries.

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

     data(afcon)

_F_o_r_m_a_t:

     This data frame contains the following columns:

     _x an easting in decimal degrees (taken as centroid of shapefile
          polygon)

     _y an northing in decimal degrees (taken as centroid of shapefile
          polygon)

     _t_o_t_c_o_n index of total conflict 1966-78

     _n_a_m_e country name

     _i_d country id number as in paper

_N_o_t_e:

     All source data files prepared by Luc Anselin, Spatial Analysis
     Laboratory, Department of Agricultural and Consumer Economics,
     University of Illinois, Urbana-Champaign.

_S_o_u_r_c_e:

     Anselin, L. and John O'Loughlin. 1992. Geography of international
     conflict and cooperation: spatial dependence and regional context
     in Africa.  In The New Geopolitics, ed. M. Ward, pp. 39-75. 
     Philadelphia, PA: Gordon and Breach. also: Anselin, L. 1995. Local
     indicators of spatial association, Geographical Analysis, 27,
     Table 1, p. 103.

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

     data(afcon)
     plot(africa.rook.nb, afxy)
     plot(diffnb(paper.nb, africa.rook.nb), afxy, col="red", add=TRUE)
     text(afxy, labels=attr(africa.rook.nb, "region.id"), pos=4, offset=0.4)
     moran.test(afcon$totcon, nb2listw(africa.rook.nb))
     moran.test(afcon$totcon, nb2listw(paper.nb))
     geary.test(afcon$totcon, nb2listw(paper.nb))

