ancestry            package:latticeExtra            R Documentation

_M_o_d_a_l _a_n_c_e_s_t_r_y _b_y _C_o_u_n_t_y _a_c_c_o_r_d_i_n_g _t_o _U_S _2_0_0_0 _C_e_n_s_u_s

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

     This data set records the population and the three most frequently
     reported ancestries by US county, according to the 2000 census.

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

     data(ancestry)

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

     A data frame with 3219 observations on the following 5 variables.

     '_c_o_u_n_t_y' A factor. An attempt has been made to make the levels
          look similar to the county names used in the 'maps' package.  

     '_p_o_p_u_l_a_t_i_o_n' a numeric vector

     '_t_o_p' a character vector

     '_s_e_c_o_n_d' a character vector

     '_t_h_i_r_d' a character vector

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

     U.S. Census Bureau.  The ancestry data were extracted from Summary
     File 3:

     <URL:
     http://factfinder.census.gov/jsp/saff/SAFFInfo.jsp?_pageId=sp4_decennial_sf3>

     which is based on the 'long form' questionnaire (asked to 1 in 6
     households surveyed).

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

     <URL: http://www.census.gov/prod/cen2000/doc/sf3.pdf>

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

     'mapplot', for examples.

