comparison toolboxes/FullBNT-1.0.7/docs/graph_to_dot.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function graph_to_dot(adj, varargin)
+%GRAPH_TO_DOT  Makes a GraphViz (AT&T) file representing an adjacency matrix
+% graph_to_dot(adj, ...) writes to the specified filename.
+%
+% Optional arguments can be passed as name/value pairs: [default]
+%
+% 'filename' - if omitted, writes to 'tmp.dot'
+% 'arc_label' - arc_label{i,j} is a string attached to the i-j arc [""]
+% 'node_label' - node_label{i} is a string attached to the node i ["i"]
+% 'width'     - width in inches [10]
+% 'height'    - height in inches [10]
+% 'leftright' - 1 means layout left-to-right, 0 means top-to-bottom [0]
+% 'directed'  - 1 means use directed arcs, 0 means undirected [1]
+%
+% For details on graphviz, See http://www.research.att.com/sw/tools/graphviz
+%
+% See also dot_to_graph and draw_dot.
+
+% First version written by Kevin Murphy 2002.
+% Modified by Leon Peshkin, Jan 2004.
+% Bugfix by Tom Minka, Mar 2004.
+                   
+node_label = [];   arc_label = [];   % set default args
+width = 10;        height = 10;
+leftright = 0;     directed = 1;     filename = 'tmp.dot';
+
+for i = 1:2:nargin-1                    % get optional args
+  switch varargin{i}
+    case 'filename', filename = varargin{i+1};
+    case 'node_label', node_label = varargin{i+1};
+    case 'arc_label', arc_label = varargin{i+1};
+    case 'width', width = varargin{i+1};
+    case 'height', height = varargin{i+1};
+    case 'leftright', leftright = varargin{i+1};
+    case 'directed', directed = varargin{i+1};
+  end
+end
+% minka
+if ~directed
+  adj = triu(adj | adj');
+end
+
+fid = fopen(filename, 'w');
+if directed
+  fprintf(fid, 'digraph G {\n');
+  arctxt = '->'; 
+  if isempty(arc_label)
+    labeltxt = '';
+  else
+    labeltxt = '[label="%s"]';
+  end
+else
+  fprintf(fid, 'graph G {\n');
+  arctxt = '--'; 
+  if isempty(arc_label)
+    labeltxt = '[dir=none]';
+  else
+    labeltext = '[label="%s",dir=none]';
+  end
+end
+edgeformat = strcat(['%d ',arctxt,' %d ',labeltxt,';\n']);
+fprintf(fid, 'center = 1;\n');
+fprintf(fid, 'size=\"%d,%d\";\n', width, height);
+if leftright
+  fprintf(fid, 'rankdir=LR;\n');
+end
+Nnds = length(adj);
+for node = 1:Nnds               %  process nodes 
+  if isempty(node_label)
+    fprintf(fid, '%d;\n', node);
+  else
+    fprintf(fid, '%d [ label = "%s" ];\n', node, node_label{node});
+  end
+end
+for node1 = 1:Nnds   % process edges
+  arcs = find(adj(node1,:));         % children(adj, node);
+  for node2 = arcs
+    if  ~isempty(arc_label)
+      fprintf(fid, edgeformat,node1,node2,arc_label{node1,node2});
+    else
+      fprintf(fid, edgeformat, node1, node2);    
+    end    
+  end
+end
+fprintf(fid, '}');
+fclose(fid);