comparison toolboxes/FullBNT-1.0.7/KPMtools/marginalize_table.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function smallT = marginalize_table(bigT, bigdom, bigsz, onto, maximize)
+% MARG_TABLE Marginalize a table
+% function smallT = marginalize_table(bigT, bigdom, bigsz, onto, maximize)
+
+% Like marg_table in BNT, except we do not assume the domains are sorted
+
+if nargin < 5, maximize = 0; end
+
+
+smallT = myreshape(bigT, bigsz); % make sure it is a multi-dim array
+sum_over = mysetdiff(bigdom, onto);
+ndx = find_equiv_posns(sum_over, bigdom);
+if maximize
+  for i=1:length(ndx)
+    smallT = max(smallT, [], ndx(i));
+  end
+else
+  for i=1:length(ndx)
+    smallT = sum(smallT, ndx(i));
+  end
+end
+
+
+ns = zeros(1, max(bigdom));
+%ns(bigdom) = mysize(bigT); % ignores trailing dimensions of size 1
+ns(bigdom) = bigsz;
+
+% If onto has a different ordering than bigdom, the following
+% will produce the wrong results
+
+%smallT = squeeze(smallT); % remove all dimensions of size 1
+%smallT = myreshape(smallT, ns(onto)); % put back relevant dims of size 1
+
+% so permute dimensions to match desired ordering (as specified by onto)
+
+
+% like find_equiv_posns, but keeps ordering
+outdom = [onto sum_over];
+for i=1:length(outdom)
+  j = find(bigdom==outdom(i));
+  match(i) = j;
+end
+outdom = [onto sum_over];
+for i=1:length(outdom)
+  j = find(bigdom==outdom(i));
+  match(i) = j;
+end
+if match ~= 1
+  smallT = permute(smallT, match);
+end