Examples with XYSeries org.jfree.data.xy.XYSeries used on opensource projects

Example 21 with XYSeries

use of org.jfree.data.xy.XYSeries in project gephi by gephi.

the class ChartsUtils method regress.

/********Private methods*********/
/**
     * Calculates linear regression points from a XYSeriesCollection data set
     * Code obtained from http://pwnt.be/2009/08/17/simple-linear-regression-with-jfreechart
     */
private static XYDataset regress(XYSeriesCollection data) {
    // Determine bounds
    double xMin = Double.MAX_VALUE, xMax = 0;
    for (int i = 0; i < data.getSeriesCount(); i++) {
        XYSeries ser = data.getSeries(i);
        for (int j = 0; j < ser.getItemCount(); j++) {
            double x = ser.getX(j).doubleValue();
            if (x < xMin) {
                xMin = x;
            }
            if (x > xMax) {
                xMax = x;
            }
        }
    }
    // Create 2-point series for each of the original series
    XYSeriesCollection coll = new XYSeriesCollection();
    for (int i = 0; i < data.getSeriesCount(); i++) {
        XYSeries ser = data.getSeries(i);
        int n = ser.getItemCount();
        double sx = 0, sy = 0, sxx = 0, sxy = 0, syy = 0;
        for (int j = 0; j < n; j++) {
            double x = ser.getX(j).doubleValue();
            double y = ser.getY(j).doubleValue();
            sx += x;
            sy += y;
            sxx += x * x;
            sxy += x * y;
            syy += y * y;
        }
        double b = (n * sxy - sx * sy) / (n * sxx - sx * sx);
        double a = sy / n - b * sx / n;
        XYSeries regr = new XYSeries(ser.getKey());
        regr.add(xMin, a + b * xMin);
        regr.add(xMax, a + b * xMax);
        coll.addSeries(regr);
    }
    return coll;
}

Example 22 with XYSeries

use of org.jfree.data.xy.XYSeries in project openblocks by mikaelhg.

the class CLineGraph method getCSV.

public String getCSV() {
    lock = true;
    int max = 0;
    List<List<String>> columns = new ArrayList<List<String>>();
    for (int i = 0; i < chartData.getSeriesNum(); i++) {
        if (i == 0) {
            //{name, v1, v2, v3}
            List<String> time = new ArrayList<String>();
            XYSeries s = ((XYSeriesCollection) chart.getXYPlot().getDataset()).getSeries(i);
            max = Math.max(max, s.getItemCount());
            time.add("TIME,");
            for (Object o : s.getItems()) {
                XYDataItem item = (XYDataItem) o;
                time.add(item.getX() + ",");
            }
            columns.add(time);
        }
        //{name, v1, v2, v3}
        List<String> values = new ArrayList<String>();
        XYSeries s = ((XYSeriesCollection) chart.getXYPlot().getDataset()).getSeries(i);
        max = Math.max(max, s.getItemCount());
        values.add(s.getKey().toString() + ",");
        for (Object o : s.getItems()) {
            XYDataItem item = (XYDataItem) o;
            values.add(item.getY() + ",");
        }
        columns.add(values);
    }
    StringBuilder output = new StringBuilder();
    for (int i = 0; i < max; i++) {
        for (int j = 0; j < columns.size(); j++) {
            if (i < columns.get(j).size()) {
                output.append(columns.get(j).get(i));
            } else {
                output.append(",");
            }
        }
        output.append("\n");
    }
    lock = false;
    return output.toString();
}

Example 23 with XYSeries

use of org.jfree.data.xy.XYSeries in project openblocks by mikaelhg.

the class CLineGraph method clearValues.

/**
     * Clear the graph starting from the startTime.
     * @param startTime an x-value on the graph
     */
public void clearValues(int index, double startTime) {
    if (!lock) {
        XYSeries s = ((XYSeriesCollection) chart.getXYPlot().getDataset()).getSeries(index);
        int i = s.indexOf(startTime);
        if (i >= 0) {
            int total = s.getItemCount();
            for (; i < total; total--) {
                s.remove(i);
            }
        }
    }
}

Example 24 with XYSeries

use of org.jfree.data.xy.XYSeries in project openblocks by mikaelhg.

the class CLineGraph method updateValues.

/**
     * Updates the values for the specified seriesName with the given values
     * @param seriesName the name a series in the graph
     * @param index the index of the desired series to update
     * @param time the time at which to update
     * @param value the value to update
     */
public void updateValues(String seriesName, int index, double time, double value) {
    if (!lock) {
        XYSeries s = ((XYSeriesCollection) chart.getXYPlot().getDataset()).getSeries(index);
        s.setKey(seriesName);
        s.addOrUpdate(time, value);
    }
}

Example 25 with XYSeries

use of org.jfree.data.xy.XYSeries in project openblocks by mikaelhg.

the class CLineGraph method updateSeriesNameAt.

/**
     * Updates the series name at the specified index
     * @param seriesName the new seriesName to set at the specified index
     * @param index the desired index to set the new seriesName to
     */
public void updateSeriesNameAt(String seriesName, int index) {
    if (!lock) {
        XYSeries s = ((XYSeriesCollection) chart.getXYPlot().getDataset()).getSeries(index);
        s.setKey(seriesName);
    }
}