Minor Description
Within the file:
/mrlegacy/src/main/java/org/apache/mahout/cf/taste/impl/similarity/EuclideanDistanceSimilarity.java
Mentions that the implementation should be sqrt
/ (1 + distance).
Once the equation is simplified, should be:
1 / ((1 + distance) / sqrt)
Coded:
return 1.0 / ((1.0 + Math.sqrt(sumXYdiff2)) / Math.sqrt);
But instead is (missing grouping brackets):
1 / (1 + distance / sqrt )
Coded:
return 1.0 / (1.0 + Math.sqrt(sumXYdiff2) / Math.sqrt);