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Issue not present in version "10.4.1 for Linux x86 (64-bit) (April 11, 2016)"

trainingset = {"A" -> 1, "B" -> 4, "C" -> 6};
classifier = 
 Classify[trainingset, 
  Method -> {"NearestNeighbors", "NeighborsNumber" -> 5, 
    "DistanceFunction" -> CosineDistance}]

I'm getting the message

Unknown option "DistanceFunction" in Classify

However, when I evaluate 

ClassifierInformation[classifier, "Properties"]

I see "DistanceFunction" in the list of properties returned.

I see the same thing in the OpenCV toolbox. In KnearestNeighbors function, I can not change the DistanceFunction despite Euclidean distance not being the best choice, specially with big data.

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  • 1
    $\begingroup$ It seems that is a bug in the Classify function $\endgroup$
    – BetterEnglish
    Jan 15, 2016 at 22:20

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