Example usage for org.apache.commons.math3.util ResizableDoubleArray addElement

Introduction

In this page you can find the example usage for org.apache.commons.math3.util ResizableDoubleArray addElement.

Prototype

public synchronized void addElement(double value) 

Source Link

Document

Adds an element to the end of this expandable array.

Usage

From source file:com.itemanalysis.jmetrik.graph.density.DensityAnalysis.java

public XYSeriesCollection summarize() throws SQLException, IllegalArgumentException {
    Statement stmt = null;//from w  w  w. j  a v  a 2 s  . c om
    ResultSet rs = null;
    TreeMap<String, ResizableDoubleArray> data = new TreeMap<String, ResizableDoubleArray>();

    //set progress bar information
    int nrow = 0;
    JmetrikPreferencesManager pref = new JmetrikPreferencesManager();
    String dbType = pref.getDatabaseType();
    if (DatabaseType.APACHE_DERBY.toString().equals(dbType)) {
        JmetrikDatabaseFactory dbFactory = new JmetrikDatabaseFactory(DatabaseType.APACHE_DERBY);
        nrow = dao.getRowCount(conn, tableName);
    } else {
        //add other databases here when functionality is added
    }
    maxProgress = (double) nrow;

    Table sqlTable = new Table(tableName.getNameForDatabase());
    SelectQuery select = new SelectQuery();
    select.addColumn(sqlTable, variable.getName().nameForDatabase());
    if (hasGroupingVariable)
        select.addColumn(sqlTable, groupVar.getName().nameForDatabase());
    stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    rs = stmt.executeQuery(select.toString());

    String conditionalName = "";
    ResizableDoubleArray cData = null;
    double value = Double.NaN;

    while (rs.next()) {
        if (groupVar != null) {
            String groupName = rs.getString(groupVar.getName().nameForDatabase());
            if (rs.wasNull()) {
                groupName = "";
            }
            conditionalName = groupName;
        } else {
            conditionalName = "Series 1";
        }

        cData = data.get(conditionalName);
        if (cData == null) {
            cData = new ResizableDoubleArray((int) maxProgress);
            data.put(conditionalName, cData);
        }
        value = rs.getDouble(variable.getName().nameForDatabase());
        if (!rs.wasNull()) {
            cData.addElement(value);
        }
        updateProgress();
    }
    rs.close();
    stmt.close();

    String kType = command.getSelectOneOption("kernel").getSelectedArgument();
    double adjustment = command.getFreeOption("adjust").getDouble();
    KernelFactory kernelFactory = new KernelFactory(kType);

    KernelFunction kernelFunction = kernelFactory.getKernelFunction();
    Bandwidth bandwidth = null;
    KernelDensity density = null;
    UniformDistributionApproximation uniform = null;
    Min min = new Min();
    Max max = new Max();
    double[] x = null;

    this.firePropertyChange("progress-ind-on", null, null);

    XYSeriesCollection seriesCollection = new XYSeriesCollection();
    XYSeries series = null;
    for (String s : data.keySet()) {
        series = new XYSeries(s);
        x = data.get(s).getElements();
        bandwidth = new ScottsBandwidth(x, adjustment);
        uniform = new UniformDistributionApproximation(min.evaluate(x), max.evaluate(x), KERNEL_POINTS);
        density = new KernelDensity(kernelFunction, bandwidth, uniform);

        double[] dens = density.evaluate(x);
        double[] points = density.getPoints();
        for (int i = 0; i < dens.length; i++) {
            series.add(points[i], dens[i]);
        }
        seriesCollection.addSeries(series);
    }
    return seriesCollection;

}

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From source file:com.itemanalysis.jmetrik.stats.ranking.RankingAnalysis.java

private ResizableDoubleArray getData() throws SQLException {
    Statement stmt = null;//from   w ww .jav a  2 s.  com
    ResultSet rs = null;
    ResizableDoubleArray data = new ResizableDoubleArray((int) (maxProgress / 2.0));

    try {
        //connect to table to create data set to be ranked
        Table sqlTable = new Table(tableName.getNameForDatabase());
        SelectQuery select = new SelectQuery();
        select.addColumn(sqlTable, variable.getName().nameForDatabase());
        stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
        rs = stmt.executeQuery(select.toString());

        String vNameDb = variable.getName().nameForDatabase();

        double x = Double.NaN;
        int dbIndex = 0;//row position index for all records in db
        while (rs.next()) {
            x = rs.getDouble(vNameDb);
            if (!rs.wasNull()) {
                if (ascending) {
                    data.addElement(x);//ascending order
                } else {
                    data.addElement(-x);//descending order
                }

            } else {
                missingIndex.add(dbIndex);
            }
            dbIndex++;
            updateProgress();
        }
        return data;
    } catch (SQLException ex) {
        throw ex;
    } finally {
        if (rs != null)
            rs.close();
        if (stmt != null)
            stmt.close();

    }
}

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