Example usage for weka.filters.unsupervised.attribute NominalToBinary setOptions

Introduction

In this page you can find the example usage for weka.filters.unsupervised.attribute NominalToBinary setOptions.

Prototype

@Override
public void setOptions(String[] options) throws Exception 

Source Link

Document

Parses a given list of options.

Usage

From source file:liac.igmn.loader.DataLoader.java

License:Open Source License

/**
 * Carrega dataset a partir de arquivo ARFF e binariza os atributos nominais.
 * Assume que a classe seja o ultimo atributo.
 * //from   w  ww  .  j a v  a 2  s  .  co m
 * @param filename path do arquivo
 * @return dataset
 * @throws DataLoaderException lancado quando o arquivo nao e encontrado
 * ou quando ocorre algum erro de IO
 */
public static Dataset loadARFF(String filename) throws DataLoaderException {
    Dataset dataset = new Dataset();
    try {
        ArffLoader loader = new ArffLoader();

        loader.setSource(new File(filename));
        Instances data = loader.getDataSet();
        Instances m_Intances = new Instances(data);

        data.setClassIndex(data.numAttributes() - 1);

        String[] classes = new String[data.numClasses()];
        for (int i = 0; i < data.numClasses(); i++)
            classes[i] = data.classAttribute().value(i);
        dataset.setClassesNames(classes);

        NominalToBinary filter = new NominalToBinary();
        filter.setInputFormat(m_Intances);
        filter.setOptions(new String[] { "-A" });
        m_Intances = Filter.useFilter(m_Intances, filter);

        int inputSize = m_Intances.numAttributes() - data.numClasses();

        dataset.setInputSize(inputSize);
        dataset.setNumClasses(data.numClasses());

        dataset.setWekaDataset(m_Intances);
    } catch (IOException e) {
        throw new DataLoaderException("Arquivo no encontrado", e.getCause());
    } catch (Exception e) {
        throw new DataLoaderException("Falha na converso do arquivo", e.getCause());
    }

    return dataset;
}

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