Example usage for org.jfree.data.general HeatMapDataset getZValue

Introduction

In this page you can find the example usage for org.jfree.data.general HeatMapDataset getZValue.

Prototype

public double getZValue(int xIndex, int yIndex);

Source Link

Document

Returns the z-value at the specified sample position in the dataset.

Usage

From source file:org.jfree.data.general.HeatMapUtilities.java

/**
 * Returns a dataset containing one series that holds a copy of the (x, z)
 * data from one row (y-index) of the specified dataset.
 *
 * @param dataset  the dataset (<code>null</code> not permitted).
 * @param row  the row (y) index.//from   w w w. j  a  va 2 s .  com
 * @param seriesName  the series name/key (<code>null</code> not permitted).
 *
 * @return The dataset.
 */
public static XYDataset extractRowFromHeatMapDataset(HeatMapDataset dataset, int row, Comparable seriesName) {
    XYSeries series = new XYSeries(seriesName);
    int cols = dataset.getXSampleCount();
    for (int c = 0; c < cols; c++) {
        series.add(dataset.getXValue(c), dataset.getZValue(c, row));
    }
    XYSeriesCollection result = new XYSeriesCollection(series);
    return result;
}

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From source file:org.jfree.data.general.HeatMapUtilities.java

/**
 * Returns a dataset containing one series that holds a copy of the (y, z)
 * data from one column (x-index) of the specified dataset.
 *
 * @param dataset  the dataset (<code>null</code> not permitted).
 * @param column  the column (x) index.//from w w  w  . j a va2s.  c o m
 * @param seriesName  the series name (<code>null</code> not permitted).
 *
 * @return The dataset.
 */
public static XYDataset extractColumnFromHeatMapDataset(HeatMapDataset dataset, int column,
        Comparable seriesName) {
    XYSeries series = new XYSeries(seriesName);
    int rows = dataset.getYSampleCount();
    for (int r = 0; r < rows; r++) {
        series.add(dataset.getYValue(r), dataset.getZValue(column, r));
    }
    XYSeriesCollection result = new XYSeriesCollection(series);
    return result;
}

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From source file:org.jfree.data.general.HeatMapUtils.java

/**
 * Creates an image that displays the values from the specified dataset.
 *
 * @param dataset  the dataset ({@code null} not permitted).
 * @param paintScale  the paint scale for the z-values ({@code null}
 *         not permitted).//from   w ww .j av a 2 s . co  m
 *
 * @return A buffered image.
 */
public static BufferedImage createHeatMapImage(HeatMapDataset dataset, PaintScale paintScale) {

    Args.nullNotPermitted(dataset, "dataset");
    Args.nullNotPermitted(paintScale, "paintScale");
    int xCount = dataset.getXSampleCount();
    int yCount = dataset.getYSampleCount();
    BufferedImage image = new BufferedImage(xCount, yCount, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2 = image.createGraphics();
    for (int xIndex = 0; xIndex < xCount; xIndex++) {
        for (int yIndex = 0; yIndex < yCount; yIndex++) {
            double z = dataset.getZValue(xIndex, yIndex);
            Paint p = paintScale.getPaint(z);
            g2.setPaint(p);
            g2.fillRect(xIndex, yCount - yIndex - 1, 1, 1);
        }
    }
    return image;
}

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From source file:org.jfree.data.general.HeatMapUtilities.java

/**
 * Creates an image that displays the values from the specified dataset.
 *
 * @param dataset  the dataset (<code>null</code> not permitted).
 * @param paintScale  the paint scale for the z-values (<code>null</code>
 *         not permitted).//from ww w  .  j  a  v  a 2  s. c  o  m
 *
 * @return A buffered image.
 */
public static BufferedImage createHeatMapImage(HeatMapDataset dataset, PaintScale paintScale) {

    ParamChecks.nullNotPermitted(dataset, "dataset");
    ParamChecks.nullNotPermitted(paintScale, "paintScale");
    int xCount = dataset.getXSampleCount();
    int yCount = dataset.getYSampleCount();
    BufferedImage image = new BufferedImage(xCount, yCount, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2 = image.createGraphics();
    for (int xIndex = 0; xIndex < xCount; xIndex++) {
        for (int yIndex = 0; yIndex < yCount; yIndex++) {
            double z = dataset.getZValue(xIndex, yIndex);
            Paint p = paintScale.getPaint(z);
            g2.setPaint(p);
            g2.fillRect(xIndex, yCount - yIndex - 1, 1, 1);
        }
    }
    return image;
}

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