Examples of org.apache.mahout.math.Vector.Element.index()

Class org.apache.mahout.math.Vector.Element

Examples of org.apache.mahout.math.Vector.Element.index()

org.apache.mahout.math.Vector.Element.index()

      }
      index++;
    }


    for (Element element : vector.nonZeroes()) {
      index = element.index();
      assertTrue(expectedIndices.contains(index));
      assertEquals((double) index * 2, element.get(), EPSILON);
      expectedIndices.remove(index);
    }
    assertTrue(expectedIndices.isEmpty());

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    while (it.hasNext()) {  // hasNext is called more often than next
      if (i % 2 == 0) {
        element = it.next();
      }
      //noinspection ConstantConditions
      assertEquals(element.index(), 2* (i/2));
      assertEquals(element.get(), vector.get(2* (i/2)), 0);
      ++i;
    }
    assertEquals(7, i);  // Last element is print only once.

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    while (it.hasNext()) { // hasNext is called more often than next
      if (i % 2 == 0) {
        element = it.next();
      }
      //noinspection ConstantConditions
      assertEquals(element.index(), i/2);
      assertEquals(element.get(), vector.get(i/2), 0);
      ++i;
    }
    assertEquals(197, i);  // Last element is print only once.
  }

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    // Test all iterator.
    it = vector.all().iterator();
    i = 0;
    while (it.hasNext()) { // hasNext is called more often than next
      Element element = it.next();
      assertEquals(i, element.index());
      ++i;
    }
    assertFalse(it.hasNext());
    assertEquals(99, i);  // Last element is print only once.
  }

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    // Test non zero iterator.
    Iterator<Element> it = vector.nonZeroes().iterator();
    int i = 0;
    while (it.hasNext()) {
      Element e = it.next();
      assertTrue(expected.contains(e.index()));
      assertTrue(expectedValue.contains(e.get()));
      ++i;
    }
    assertEquals(8, i);

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    // Set one element to 0.
    it = vector.nonZeroes().iterator();
    i = 0;
    while (it.hasNext()) {
      Element e = it.next();
      if (e.index() == 5) {
        e.set(0.0);
      }
      ++i;
    }
    assertEquals(8, i);

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    // Remove one element
    it = vector.nonZeroes().iterator();
    i = 0;
    while (it.hasNext()) {
      Element e = it.next();
      if (e.index() == 5) {
        vector.set(5, 0.0);
      }
      ++i;
    }
    assertEquals(7, i); // This just got messed up.

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            Vector tmp = datamodel.getVectorOfItems(userid);
            Iterator<Element> iter = tmp.iterateNonZero();
            double rate = 0.0;
            while (iter.hasNext()) {
                Element e = iter.next();
                rate += (e.get() - mean - bitems.get(e.index()));
            }
            busers.put(userid, rate / (tmp.getNumNondefaultElements() + lamda3));
            // busers.put(userid, 0);
        }
    }

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                // iterate to items
                Iterator<Element> itor = tmpitems.iterateNonZero();
                while (itor.hasNext()) {


                    Element e = itor.next();
                    int itemid = e.index();


                    // actual rating and estimated rating
                    double rui = datamodel.getPreferenceValue(userid, itemid);
                    double pui = predictPreference(userid, itemid);
                    double eui = rui - pui;

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            Vector tmp = userItemMatrix.get(userid);
            Iterator<Element> iter = tmp.iterateNonZero();


            while (iter.hasNext()) {
                Element el = iter.next();
                int itemid = el.index();
            }
        }
    }


    @Override

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