Examples with MunroPatBinning ml.shifu.shifu.core.binning.MunroPatBinning used on opensource projects

Example 1 with MunroPatBinning

use of ml.shifu.shifu.core.binning.MunroPatBinning in project shifu by ShifuML.

the class BinningDataUDF method exec.

/*
     * (non-Javadoc)
     * 
     * @see org.apache.pig.EvalFunc#exec(org.apache.pig.data.Tuple)
     */
@Override
public Tuple exec(Tuple input) throws IOException {
    if (input == null || input.size() < 2) {
        return null;
    }
    Integer columnId = (Integer) input.get(0);
    DataBag databag = (DataBag) input.get(1);
    ColumnConfig columnConfig = super.columnConfigList.get(columnId);
    AbstractBinning<?> binning = null;
    if (columnConfig.isCategorical()) {
        binning = new CategoricalBinning(-1, super.modelConfig.getMissingOrInvalidValues(), this.maxCategorySize);
    } else {
        if (super.modelConfig.getBinningMethod().equals(BinningMethod.EqualInterval)) {
            binning = new EqualIntervalBinning(modelConfig.getStats().getMaxNumBin());
        } else {
            switch(this.modelConfig.getBinningAlgorithm()) {
                case Native:
                    log.info("Invoke Native binning method, memory cosuming!!");
                    // always merge bins
                    binning = new NativeBinning(modelConfig.getStats().getMaxNumBin(), true);
                    break;
                case SPDT:
                case SPDTI:
                    log.info("Invoke SPDT(Streaming Parallel Decision Tree) binning method, ");
                    binning = new EqualPopulationBinning(modelConfig.getStats().getMaxNumBin());
                    break;
                case MunroPat:
                case MunroPatI:
                    log.info("Invoke Munro & Paterson selecting algorithm");
                    binning = new MunroPatBinning(modelConfig.getStats().getMaxNumBin());
                    break;
                default:
                    log.info("Default: Invoke Munro & Paterson selecting algorithm");
                    binning = new MunroPatBinning(modelConfig.getStats().getMaxNumBin());
                    break;
            }
        }
    }
    Iterator<Tuple> iterator = databag.iterator();
    while (iterator.hasNext()) {
        Tuple element = iterator.next();
        if (element == null || element.size() < 2) {
            continue;
        }
        Object value = element.get(1);
        if (value != null) {
            binning.addData(value.toString());
        }
    }
    Tuple output = TupleFactory.getInstance().newTuple(2);
    output.set(0, columnId);
    // Do check here. It's because if there are too many value for categorical variable,
    // it will consume too much memory when join them together, that will cause OOM exception
    List<?> dataBin = binning.getDataBin();
    if (dataBin.size() > this.maxCategorySize) {
        output.set(1, "");
    } else {
        output.set(1, StringUtils.join(dataBin, CalculateStatsUDF.CATEGORY_VAL_SEPARATOR));
    }
    log.info("Finish merging bin info for columnId - " + columnId);
    return output;
}