Example usage for org.jfree.chart.title TextTitle setFrame

Introduction

In this page you can find the example usage for org.jfree.chart.title TextTitle setFrame.

Prototype

public void setFrame(BlockFrame frame) 

Source Link

Document

Sets the frame (or border).

Usage

From source file:org.esa.beam.visat.toolviews.stat.ScatterPlotPanel.java

private void computeCoefficientOfDetermination() {
    int numberOfItems = scatterpointsDataset.getSeries(0).getItemCount();
    double arithmeticMeanOfX = 0; //arithmetic mean of X
    double arithmeticMeanOfY = 0; //arithmetic mean of Y
    double varX = 0; //variance of X
    double varY = 0; //variance of Y
    double coVarXY = 0; //covariance of X and Y;
    //compute arithmetic means
    for (int i = 0; i < numberOfItems; i++) {
        arithmeticMeanOfX += scatterpointsDataset.getXValue(0, i);
        arithmeticMeanOfY += scatterpointsDataset.getYValue(0, i);
    }//from  w w  w .  j  ava  2s  .c o m
    arithmeticMeanOfX /= numberOfItems;
    arithmeticMeanOfY /= numberOfItems;
    //compute variances and covariance
    for (int i = 0; i < numberOfItems; i++) {
        varX += Math.pow(scatterpointsDataset.getXValue(0, i) - arithmeticMeanOfX, 2);
        varY += Math.pow(scatterpointsDataset.getYValue(0, i) - arithmeticMeanOfY, 2);
        coVarXY += (scatterpointsDataset.getXValue(0, i) - arithmeticMeanOfX)
                * (scatterpointsDataset.getYValue(0, i) - arithmeticMeanOfY);
    }
    //computation of coefficient of determination
    double r2 = Math.pow(coVarXY, 2) / (varX * varY);
    r2 = MathUtils.round(r2, Math.pow(10.0, 5));

    final double[] coefficients = Regression.getOLSRegression(scatterpointsDataset, 0);
    final double intercept = coefficients[0];
    final double slope = coefficients[1];
    final String linearEquation;
    if (intercept >= 0) {
        linearEquation = "y = " + (float) slope + "x + " + (float) intercept;
    } else {
        linearEquation = "y = " + (float) slope + "x - " + Math.abs((float) intercept);
    }

    TextTitle tt = new TextTitle(linearEquation + "\nR = " + r2);
    tt.setTextAlignment(HorizontalAlignment.RIGHT);
    tt.setFont(chart.getLegend().getItemFont());
    tt.setBackgroundPaint(new Color(200, 200, 255, 100));
    tt.setFrame(new BlockBorder(Color.white));
    tt.setPosition(RectangleEdge.BOTTOM);

    r2Annotation = new XYTitleAnnotation(0.98, 0.02, tt, RectangleAnchor.BOTTOM_RIGHT);
    r2Annotation.setMaxWidth(0.48);
    getPlot().addAnnotation(r2Annotation);
}

---