BNW using Octave instead of Matlab.

This version of BNW should perform the same as the original version. The only difference is that it uses Octave instead of Matlab when running BayesNet Toolbox during parameter learning.

I am calling this BNW_1.02. It can be accessed at:
compbio.uthsc.edu/BNW_1.02

1 files changed, 23 insertions, 0 deletions

diff --git a/sourcecodes/bnt-master/graph/acyclic.m b/sourcecodes/bnt-master/graph/acyclic.m
new file mode 100644
index 00000000..0b497d73
--- /dev/null
+++ b/sourcecodes/bnt-master/graph/acyclic.m
@@ -0,0 +1,23 @@
+function b = acyclic(adj_mat, directed)
+% ACYCLIC Returns true iff the graph has no (directed) cycles.
+% b = acyclic(adj_mat, directed)
+
+adj_mat = double(adj_mat);
+if nargin < 2, directed = 1; end
+
+% e.g., G =
+% 1 -> 3
+%      |
+%      v
+% 2 <- 4   
+% In this case, 1->2 in the transitive closure, but 1 cannot get to itself.
+% If G was undirected, 1 could get to itself, but this graph is not cyclic.
+% So we cannot use the closure test in the undirected case.
+
+if directed
+  R = reachability_graph(adj_mat);
+  b = ~any(diag(R)==1);
+else
+  [d, pre, post, cycle] = dfs(adj_mat,[],directed);
+  b = ~cycle;    
+end