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$population{``Hartford'' } = 101349; $population{``New Britain" } = 59553;and so on. For doubly-indexed arrays use something like:
$population{``Hartford",``white'' } = 46382; $population{``New Britain",``white''} = 50818; $population{``Hartford'',``black''} = 37360; $population{``New Britain",``black''} = 3920;Use my Perl function draw_matrix.pl to convert doubly-indexed arrays into a form that can be typset directly by TeX as tables, with margin totals optional.