Package org.apache.mahout.math

Examples of org.apache.mahout.math.Vector.nonZeroes()

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      boolean firstIsOutFrag =  ((VectorWritable)v.get(0)).get().size() == outCardinality;
      Vector outFrag = firstIsOutFrag ? ((VectorWritable)v.get(0)).get() : ((VectorWritable)v.get(1)).get();
      Vector multiplier = firstIsOutFrag ? ((VectorWritable)v.get(1)).get() : ((VectorWritable)v.get(0)).get();

      VectorWritable outVector = new VectorWritable();
      for (Vector.Element e : multiplier.nonZeroes()) {
        row.set(e.index());
        outVector.set(outFrag.times(e.get()));
        out.collect(row, outVector);
      }
    }
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    if (usersToRecommendFor != null && !usersToRecommendFor.contains(userID)) {
      return;
    }
    Vector userVector = maybePruneUserVector(value.get());

    for (Element e : userVector.nonZeroes()) {
      itemIndexWritable.set(e.index());
      vectorOrPref.set(userID, (float) e.get());
      context.write(itemIndexWritable, vectorOrPref);
    }
  }
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