diff core/tools/param_combinations.m @ 0:e9a9cd732c1e tip

first hg version after svn

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/tools/param_combinations.m	Tue Feb 10 15:05:51 2015 +0000
@@ -0,0 +1,44 @@
+function combis = param_combinations(params, pos)
+% given a param struct with multiple options for diverse
+% parameters, param_combinations(params) returns all 
+% valid combinations of the param sets
+
+if nargin < 2
+    pos = 1;
+end
+
+% get available fields
+fields = fieldnames(params);
+
+nparams = params;
+    if pos <= numel(fields)
+        
+        for j = 1:numel(params.(fields{pos}))
+
+            % ---
+            % successively ralter the params struct,
+            % choosing one of the options
+            % ---
+            if ~iscell(params.(fields{pos}))
+                
+                nparams.(fields{pos}) = params.(fields{pos})(j);
+            else
+                
+                nparams.(fields{pos}) = params.(fields{pos}){j};
+            end
+            
+            if j == 1
+                combis = param_combinations(nparams, pos + 1);
+                
+            else
+                
+                % gather the resulting configurations, in reverse order 
+                % regarding the recursion
+                combis = cat(1, param_combinations(nparams, pos + 1), combis);
+            end
+        end
+    else
+        % we have reached the leaves, containing single combinations
+        combis = nparams;
+    end    
+end