Mercurial > hg > camir-ismir2012
diff toolboxes/FullBNT-1.0.7/KPMtools/compute_counts.m @ 0:cc4b1211e677 tip
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646 (e263d8a21543) added further path and more save "camirversion.m"
| author | Daniel Wolff |
|---|---|
| date | Fri, 19 Aug 2016 13:07:06 +0200 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toolboxes/FullBNT-1.0.7/KPMtools/compute_counts.m Fri Aug 19 13:07:06 2016 +0200 @@ -0,0 +1,17 @@ +function count = compute_counts(data, sz) +% COMPUTE_COUNTS Count the number of times each combination of discrete assignments occurs +% count = compute_counts(data, sz) +% +% data(i,t) is the value of variable i in case t +% sz(i) : values for variable i are assumed to be in [1:sz(i)] +% +% Example: to compute a transition matrix for an HMM from a sequence of labeled states: +% transmat = mk_stochastic(compute_counts([seq(1:end-1); seq(2:end)], [nstates nstates])); + +assert(length(sz) == size(data, 1)); +P = prod(sz); +indices = subv2ind(sz, data'); % each row of data' is a case +%count = histc(indices, 1:P); +count = hist(indices, 1:P); +count = myreshape(count, sz); +