function marginal = marginal_nodes(engine, nodes, t, add_ev)% MARGINAL_NODES Compute the marginal on the specified query nodes (loopy_unrolled_dbn)% marginal = marginal_nodes(engine, nodes, t)%% 't' specifies the time slice of the earliest node in 'nodes'.% 'nodes' must occur in some clique.%% Example:% Consider a DBN with 2 nodes per slice.% Then t=2, nodes=[1 3] refers to node 1 in slice 2 and node 1 in slice 3,% i.e., nodes 3 and 5 in the unrolled network,if nargin < 3, t = 1; endif nargin < 4, add_ev = 0; endmarginal = marginal_nodes(engine.unrolled_engine, nodes + (t-1)*engine.ss, add_ev);