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annotate toolboxes/FullBNT-1.0.7/bnt/potentials/@upot/marginalize_pot.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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wolffd@0 1 function smallpot = marginalize_pot(bigpot, onto, maximize)
wolffd@0 2 % MARGINALIZE_POT Marginalize a upot onto a smaller domain.
wolffd@0 3 % smallpot = marginalize_pot(bigpot, onto, maximize)
wolffd@0 4 %
wolffd@0 5 % The maximize argument is ignored
wolffd@0 6
wolffd@0 7 numer = marg_table(bigpot.p .* bigpot.u, bigpot.domain, bigpot.sizes, onto);
wolffd@0 8 denom = marg_table(bigpot.p, bigpot.domain, bigpot.sizes, onto);
wolffd@0 9
wolffd@0 10 p = denom;
wolffd@0 11 % replace 0s by 1s before dividing. This is valid since demon(i) = 0 => numer(i) = 0
wolffd@0 12 denom = denom + (denom == 0);
wolffd@0 13 u = numer ./ denom;
wolffd@0 14
wolffd@0 15 ns = zeros(1, max(bigpot.domain));
wolffd@0 16 ns(bigpot.domain) = bigpot.sizes;
wolffd@0 17
wolffd@0 18 smallpot = upot(onto, ns(onto), p, u);