comparison core/magnatagatune/tests_evals/get_data_compact.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function  [clip_dict, X, Y, valididx] = get_data_compact(clips, featureVec, simdata)
+    % ---
+    % instead of creating a new three feature vectors 
+    % for each constraint, this function links back to the 
+    % FIRST occurrence of a distinct clip and its features
+    % 
+    % TODO: try to always link ALL occurences of a feature
+    % / clip in the rankings
+    % ---
+
+    global comparison_ids;
+    global comparison_invids;
+    
+    % ---
+    % build the clip dictionary 
+    % ---
+    uniclip = unique(reshape( simdata, 1, []));
+    last_clip_pos = zeros(1, numel(uniclip));
+    
+    clip_dict = [];
+    Y = {};
+    idx_newclip = 1;
+    valididx = logical([]);
+
+    % cycle all constraints of one cv bin
+    for j = 1:size(simdata,1)
+
+        
+        % save the first clip
+        constraint = simdata(j,:);
+        
+        % ---
+        % check where the clip is and if there
+        % is space to write cosntraint data
+        % 
+        % If not, a position is created
+        a = find_clip(constraint(1), 1);
+        b = find_clip(constraint(2), 0);
+        c = find_clip(constraint(3), 0);
+
+        % [a,b,c] -> clip a more similar to clip b than to clip c 
+        
+        % adress weightings
+        if numel(constraint) == 4
+            Y(a,:) = {b, c, (constraint(4))};
+        else
+            Y(a,:) = {b, c};
+        end
+    end
+    
+    % ---
+    % get feature data
+    % NOTE: this uses an index of the comparison clips
+    % ---
+    X = featureVec(:,(comparison_invids(clip_dict)));
+    
+    for i = find(~valididx)
+        if size(Y,2) == 3
+           Y(i,:) = {[], [], 0};
+        else
+           Y(i,:) = {[], []}; 
+        end
+    end
+    
+    function clip_idx = find_clip(clip, write)
+        uc_idx = find(uniclip == clip);
+        
+        % ---
+        % do we have a place of this clip? 
+        % 
+        % NOTE: last_clip_pos has to be reset after every write
+        % ---
+        if (last_clip_pos(uc_idx) == 0) || ...
+                write && (numel(valididx) >= last_clip_pos(uc_idx)) &&...
+                (valididx(last_clip_pos(uc_idx)) == 1)
+            
+            % if not, create one
+            clip_idx = idx_newclip;
+            clip_dict(clip_idx) = clip;
+            valididx(clip_idx) = false;
+            
+            % and save into last pos
+            last_clip_pos(uc_idx) = clip_idx;
+
+            idx_newclip = idx_newclip + 1;
+        else
+            clip_idx = last_clip_pos(uc_idx);
+        end
+        
+        if write
+            valididx(clip_idx) = true;
+        end
+        
+    end
+    
+end