Changes between Version 1 and Version 2 of ExpertRecommender

Timestamp:

09/04/08 15:03:54 (16 years ago)

Author:

fmittag

Comment:

--

ExpertRecommender

@@ -17 +17 @@
  * hierarchical feature space
  * subclass-of relation has no well-defined semantic
+
+== Examples ==
 
 Example 1:
@@ -73 +75 @@
  * a feature with sub-features is for grouping purpose only and it would have no meaning to state something about this feature
  * the sub-features of a feature are specialized cases of the super-feature, so the super-feature should have at least the maximum appliance value of all of its sub-features
+
+== Suggestion ==
+
+Define a similarity metric that compares two features x and y of the same (direct) type. Until now, the value of a feature is only the applicability value of the feature.
+{{{
+sim(x,y) = 1 - dist(x,y)/2
+}}}
+The distance between two features x and y is defined as follows:
+{{{
+dist(x,y) = |x-y|
+}}}
+This means, that two features with the same applicability have the distance 0 and thus the similary 1 - 0/2 = 1. Two features with applicability -1 and 1 would have the distance 2 and the similarity 1 - 2/2 = 0. (TODO: prove the properties of a metric)
+