Example usage for org.jfree.data.function Function2D getValue

Introduction

In this page you can find the example usage for org.jfree.data.function Function2D getValue.

Prototype

public double getValue(double x);

Source Link

Document

Returns the value of the function ('y') for a given input ('x').

Usage

From source file:com.vgi.mafscaling.ClosedLoop.java

private boolean plotTrimRpmData() {
    if (setXYSeries(runData, rpmArray, trimArray)) {
        double[] ols = Regression
                .getOLSRegression(mafChartPanel.getChartPanel().getChart().getXYPlot().getDataset(1), 0);
        Function2D curve = new LineFunction2D(ols[0], ols[1]);
        currMafData.clear();//from  w w w  .  ja  v  a 2  s. co m
        currMafData.add(runData.getMinX(), curve.getValue(runData.getMinX()));
        currMafData.add(runData.getMaxX(), curve.getValue(runData.getMaxX()));
        return true;
    }
    return false;
}

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From source file:org.operamasks.faces.render.graph.ChartRenderer.java

private XYSeries createFunctionSeries(XYDataset data, int index, Key key, Function2D f, int samples) {
    XYSeries series = new XYSeries(key);
    double start = data.getXValue(index, 0);
    double end = data.getXValue(index, data.getItemCount(index) - 1);
    double step = (end - start) / samples;
    for (int i = 0; i < samples; i++) {
        double x = start + (step * i);
        series.add(x, f.getValue(x));
    }//from  ww w . java2s. co  m
    return series;
}

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

/**
 * Creates an {@link XYSeries} by sampling the specified function over a
 * fixed range.//  ww  w .  j a v  a  2s .  c  o m
 *
 * @param f  the function ({@code null} not permitted).
 * @param start  the start value for the range.
 * @param end  the end value for the range.
 * @param samples  the number of sample points (must be > 1).
 * @param seriesKey  the key to give the resulting series
 *                   ({@code null} not permitted).
 *
 * @return A series.
 *
 * @since 1.0.13
 */
public static XYSeries sampleFunction2DToSeries(Function2D f, double start, double end, int samples,
        Comparable seriesKey) {

    Args.nullNotPermitted(f, "f");
    Args.nullNotPermitted(seriesKey, "seriesKey");
    if (start >= end) {
        throw new IllegalArgumentException("Requires 'start' < 'end'.");
    }
    if (samples < 2) {
        throw new IllegalArgumentException("Requires 'samples' > 1");
    }

    XYSeries series = new XYSeries(seriesKey);
    double step = (end - start) / (samples - 1);
    for (int i = 0; i < samples; i++) {
        double x = start + (step * i);
        series.add(x, f.getValue(x));
    }
    return series;
}

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

/**
 * Creates an {@link XYSeries} by sampling the specified function over a
 * fixed range./* w w w .  j  ava  2 s .c  o  m*/
 *
 * @param f  the function (<code>null</code> not permitted).
 * @param start  the start value for the range.
 * @param end  the end value for the range.
 * @param samples  the number of sample points (must be &gt; 1).
 * @param seriesKey  the key to give the resulting series
 *                   (<code>null</code> not permitted).
 *
 * @return A series.
 *
 * @since 1.0.13
 */
public static XYSeries sampleFunction2DToSeries(Function2D f, double start, double end, int samples,
        Comparable seriesKey) {

    ParamChecks.nullNotPermitted(f, "f");
    ParamChecks.nullNotPermitted(seriesKey, "seriesKey");
    if (start >= end) {
        throw new IllegalArgumentException("Requires 'start' < 'end'.");
    }
    if (samples < 2) {
        throw new IllegalArgumentException("Requires 'samples' > 1");
    }

    XYSeries series = new XYSeries(seriesKey);
    double step = (end - start) / (samples - 1);
    for (int i = 0; i < samples; i++) {
        double x = start + (step * i);
        series.add(x, f.getValue(x));
    }
    return series;
}

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