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javaalgorithmmachine-learningwekanearest-neighbor

How to get the nearest neighbor in weka using java

I've been trying to use the Ibk nearest neighbor algorithm that goes together with the weka machine learning library.

I know how to classify instances, but I want to implement the collaborative filtering feature so I need to actually get the list of actual objects that are nearest to the object of interest.

How would I actually do so in weka using its java API?

Solution

  • How about this one 

    weka.core.neighboursearch.LinearNNSearch knn = new LinearNNSearch(
            trainingInstances);
//do other stuff

Instances nearestInstances= knn.kNearestNeighbours(target, 3)

    Here is the API documentation that you can refer to.