diff core/tools/machine_learning/scale_ratings.m @ 0:e9a9cd732c1e tip

first hg version after svn

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/tools/machine_learning/scale_ratings.m	Tue Feb 10 15:05:51 2015 +0000
@@ -0,0 +1,16 @@
+function Y = scale_ratings(Y, max_weight)
+% [Yout, Xout] = scale_ratings(Y, max_weight)
+
+
+% get maximal weight 
+weights = cell2mat(Y(:,3));
+max_dataweight = max(weights);
+
+valid = ~(cellfun(@isempty, Y(:,1)) | cellfun(@isempty, Y(:,2)));
+
+% scale weights to a maximal value of max_weight
+for i = 1:size(Y, 1)
+     if valid(i) &&  Y{i,3} > 0
+        Y{i,3} = min(max_weight, max(1, round((Y{i,3} / max_dataweight) * max_weight)));
+     end
+end
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