Example usage for weka.filters.unsupervised.attribute Normalize input

Introduction

In this page you can find the example usage for weka.filters.unsupervised.attribute Normalize input.

Prototype

@Override
public boolean input(Instance instance) throws Exception 

Source Link

Document

Input an instance for filtering.

Usage

From source file:com.sliit.normalize.NormalizeDataset.java

public String normalizeDataset() {
    System.out.println("start normalizing data");

    String filePathOut = "";
    try {/*from w  w w. j a v  a  2s . c om*/

        CSVLoader loader = new CSVLoader();
        if (reducedDiemensionFile != null) {

            loader.setSource(reducedDiemensionFile);
        } else {
            if (tempFIle != null && tempFIle.exists()) {

                loader.setSource(tempFIle);
            } else {

                loader.setSource(csvFile);
            }
        }
        Instances dataInstance = loader.getDataSet();
        Normalize normalize = new Normalize();
        dataInstance.setClassIndex(dataInstance.numAttributes() - 1);
        normalize.setInputFormat(dataInstance);
        String directory = csvFile.getParent();
        outputFile = new File(directory + "/" + "normalized" + csvFile.getName());
        if (!outputFile.exists()) {

            outputFile.createNewFile();
        }
        CSVSaver saver = new CSVSaver();
        saver.setFile(outputFile);
        for (int i = 1; i < dataInstance.numInstances(); i++) {

            normalize.input(dataInstance.instance(i));
        }
        normalize.batchFinished();
        Instances outPut = new Instances(dataInstance, 0);
        for (int i = 1; i < dataInstance.numInstances(); i++) {

            outPut.add(normalize.output());
        }
        Attribute attribute = dataInstance.attribute(outPut.numAttributes() - 1);
        for (int j = 0; j < attribute.numValues(); j++) {

            if (attribute.value(j).equals("normal.")) {
                outPut.renameAttributeValue(attribute, attribute.value(j), "0");
            } else {
                outPut.renameAttributeValue(attribute, attribute.value(j), "1");
            }
        }
        saver.setInstances(outPut);
        saver.writeBatch();
        writeToNewFile(directory);
        filePathOut = directory + "norm" + csvFile.getName();
        if (tempFIle != null) {

            tempFIle.delete();
        }
        if (reducedDiemensionFile != null) {

            reducedDiemensionFile.delete();
        }
        outputFile.delete();
    } catch (IOException e) {

        log.error("Error occurred:" + e.getMessage());
    } catch (Exception e) {

        log.error("Error occurred:" + e.getMessage());
    }
    return filePathOut;
}

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