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KNN_TextClassifier

Project description

KNN_TextClassifier

Sample Usage

>>> import KNN_TextClassifier
        #load random Data,Labels
>>> dataMatrix,labels = KNN_TextClassifier.loadData(feature_num = 4,rows = 10)
        #norm Data reduce influence of high ranges
>>> normDataSet = KNN_TextClassifier.norm(dataMatrix)

        #predict K should be odd to avoid voting result like {('A',2),('B',2)} difficult choice.
        #Parameter format classify(testData,TrainData,TrainData_Labels,K)
        '''
                testData and TrainData should be 2-D list. row represents a text data. Columns represent feature values.
                TrainData_Labels should be a list like ['A','B','C'] an element represents a row of TrainData's class.
                K should be odd as I said before.
        '''
>>> print KNN_TextClassifier.classify([[1,2,3,4],[2],[3]], dataMatrix, labels, K=3)
        ['C', 'C', 'C']

        #predict
>>> print KNN_TextClassifier.classify([['天气好','2','3','4'],['2'],['3']], dataMatrix, labels, K=3)
        ['C', 'A', 'C']

        #get transformed vector
>>> vector,vocabList = KNN_TextClassifier.word2VectorMatrix([['1','2','3','4'],['2'],['3']])
>>> print vector
        [[ 1.  1.  1.  1.]
        [ 0.  0.  1.  0.]
        [ 0.  1.  0.  0.]]

        #get transformed vocabList
>>> print vocabList
        ['1', '3', '2', '4']

Installation

$ pip install KNN_TextClassifier

Project details


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