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Python KNNClassifierRegion.getCategoryList方法代码示例

本文整理汇总了Python中KNNClassifierRegion.KNNClassifierRegion.getCategoryList方法的典型用法代码示例。如果您正苦于以下问题:Python KNNClassifierRegion.getCategoryList方法的具体用法?Python KNNClassifierRegion.getCategoryList怎么用?Python KNNClassifierRegion.getCategoryList使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在KNNClassifierRegion.KNNClassifierRegion的用法示例。


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示例1: KNNAnomalyClassifierRegion

# 需要导入模块: from KNNClassifierRegion import KNNClassifierRegion [as 别名]
# 或者: from KNNClassifierRegion.KNNClassifierRegion import getCategoryList [as 别名]

#.........这里部分代码省略.........
    returns the classified labeling of record
    """
    inputs = {
      "categoryIn": [None],
      "bottomUpIn": self._getStateAnomalyVector(record),
    }

    outputs = {"categoriesOut": numpy.zeros((1,)),
               "bestPrototypeIndices":numpy.zeros((1,)),
               "categoryProbabilitiesOut":numpy.zeros((1,))}

    # Only use points before record to classify and after the wait period.
    classifier_indexes = numpy.array(
        self._knnclassifier.getParameter('categoryRecencyList'))
    valid_idx = numpy.where(
        (classifier_indexes >= self.getParameter('trainRecords')) &
        (classifier_indexes < record.ROWID)
      )[0].tolist()

    if len(valid_idx) == 0:
      return None

    self._knnclassifier.setParameter('inferenceMode', None, True)
    self._knnclassifier.setParameter('learningMode', None, False)
    self._knnclassifier.compute(inputs, outputs)
    self._knnclassifier.setParameter('learningMode', None, True)

    classifier_distances = self._knnclassifier.getLatestDistances()
    valid_distances = classifier_distances[valid_idx]
    if valid_distances.min() <= self._classificationMaxDist:
      classifier_indexes_prev = classifier_indexes[valid_idx]
      rowID = classifier_indexes_prev[valid_distances.argmin()]
      indexID = numpy.where(classifier_indexes == rowID)[0][0]
      category = self._knnclassifier.getCategoryList()[indexID]
      return category
    return None


  def _labelToCategoryNumber(self, label):
    """
    Since the KNN Classifier stores categories as numbers, we must store each
    label as a number. This method converts from a label to a unique number.
    Each label is assigned a unique bit so multiple labels may be assigned to
    a single record.
    """
    if label not in self.saved_categories:
      self.saved_categories.append(label)
    return pow(2, self.saved_categories.index(label))

  def _labelListToCategoryNumber(self, labelList):
    """
    This method takes a list of labels and returns a unique category number.
    This enables this class to store a list of categories for each point since
    the KNN classifier only stores a single number category for each record.
    """
    categoryNumber = 0
    for label in labelList:
      categoryNumber += self._labelToCategoryNumber(label)
    return categoryNumber


  def _categoryToLabelList(self, category):
    """
    Converts a category number into a list of labels
    """
    if category is None:
开发者ID:pjpan,项目名称:nupic,代码行数:70,代码来源:KNNAnomalyClassifierRegion.py


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