comparison toolboxes/FullBNT-1.0.7/bnt/general/compute_interface_nodes.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function [interface, persist, transient] = compute_interface_nodes(intra, inter)
+% COMPUTE_INTERFACE_NODES Find the nodes in a DBN that represent a sufficient statistic
+% [interface, persist, transient] = compute_interface_nodes(intra, inter)
+%
+% The interface nodes are all those that has an incoming temporal arc,
+% or which are parents of such nodes.
+% If the parents are in the previous slice, this just means they have an
+% outgoing temporal arc.
+% (The parents of nodes with incoming temporal arcs are needed
+% because moralization will bring them into the clique.)
+%
+% The persisent nodes are all those that have one or more incoming temporal arc.
+% The transient nodes are all the non-persistent.
+%
+% See U. Kjaerulff, "dHugin: A computational system for dynamic
+% time-sliced Bayesian networks", Intl. J. Forecasting (11) 89-111, 1995
+
+n = length(intra);
+interface = [];
+persist = [];
+% any nodes with incoming arcs
+for u=1:n
+  if any(inter(:,u))
+    interface = [interface u];
+    persist = [persist u];
+  end
+end
+% Any nodes which are parents of nodes with incoming arcs
+for u=1:n
+  cs = children(intra, u);
+  if any(inter(:, cs))
+    interface = [interface u];
+  end
+  %cs = children(inter, u);
+  % if ~isempty(myintersect(cs, persist))
+  %  interface = [interface u];
+  %end
+end
+interface = unique(interface);
+persist = unique(persist);
+transient = mysetdiff(1:n, persist);
+