% A data set for 1980 Presidential election results covering 3,107 
% US counties. From Pace, R. Kelley and Ronald Barry. 1997. ``Quick
% Computation of Spatial Autoregressive Estimators'',
% in  Geographical Analysis.
% 
%  Variables are:
%  columns 1-4 are census identifiers 
%  column 5  = lattitude
%  column 6  = longitude
%  column 7  = population casting votes
%  column 8  = population over age 19 eligible to vote
%  column 9  = population with college degrees
%  column 10 = homeownership
%  column 11 = income

load elect.dat;                    % load data on votes
y =  (elect(:,7)./elect(:,8));     % convert to proportions
x1 = log(elect(:,9)./elect(:,8));  % of population
x2 = log(elect(:,10)./elect(:,8));
x3 = log(elect(:,11)./elect(:,8));
latt = elect(:,5);
long = elect(:,6);
n = length(y); 
x = [ones(n,1) x1 x2 x3];
clear x1; clear x2; clear x3;
clear elect;                % conserve on RAM memory

vnames = strvcat('voters','const','educ','homeowners','income');

result = ols(y,x);
prt(result,vnames);