How to remove outliers (small circle) from Box and Whisker diagrams in jfreechart

Question

Im using the code below to create a field diagram chart. But, depending on some values, it shows a small circle without drawing a mustache. I need to show a whisker, not a small circle. Can I hide the circle and show the whisker?

private void createBoxPlotChart(OutputStream out, Object data) throws Exception { ChartRenderingInfo info = new ChartRenderingInfo(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); byte[] ptsImageBytes = null; DefaultBoxAndWhiskerCategoryDataset boxAndWhiskerCategoryDS = createBoxAndWhiskerCategoryDataSet(); JFreeChart chart = ChartFactory.createBoxAndWhiskerChart(selectedFlight + " - Time on Hold", "Arrival Time (Days)", "Hold Time (Mins)", boxAndWhiskerCategoryDS, true); NumberAxis rangeAxis = (NumberAxis) chart.getCategoryPlot() .getRangeAxis(); rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); rangeAxis.setAutoRangeIncludesZero(true); CategoryAxis domainAxis = chart.getCategoryPlot().getDomainAxis(); BoxAndWhiskerRenderer renderer = (BoxAndWhiskerRenderer) chart.getCategoryPlot().getRenderer(); //renderer.setFillBox(false); renderer.setMeanVisible(false); renderer.setUseOutlinePaintForWhiskers(false); renderer.setMedianVisible(false); if(boxAndWhiskerCategoryDS.getRowCount()>8){ domainAxis.setCategoryLabelPositions(CategoryLabelPositions .createUpRotationLabelPositions(Math.PI / 5.0)); } chart.getCategoryPlot().setBackgroundPaint(Color.white); chart.getCategoryPlot().setDomainGridlinePaint(Color.gray); chart.getCategoryPlot().setRangeGridlinePaint(Color.gray); chart.getCategoryPlot().setOutlineVisible(false); BufferedImage pageImage = chart.createBufferedImage(CHART_WIDTH, CHART_HEIGHT, BufferedImage.TYPE_INT_BGR, info); ImageIO.write(pageImage, IMAGE_TYPE, baos); baos.flush(); if (null != baos) { ptsImageBytes = baos.toByteArray(); } ImageIO.write(pageImage, IMAGE_TYPE, out); } private DefaultBoxAndWhiskerCategoryDataset createBoxAndWhiskerCategoryDataSet() throws ParseException { DefaultBoxAndWhiskerCategoryDataset dataset = new DefaultBoxAndWhiskerCategoryDataset(); for (String graph : graphList) { final List<Double> list = new ArrayList<Double>(); for (ereportDto ereportDto : holdTimeRptList) { if (ereportDto != null && ereportDto.getHoldTime() != 0 && ereportDto.getGraphTime() != null && ereportDto.getGraphTime().equalsIgnoreCase(graph)) { double medianVal=ereportDto.getGraphHoldEntry()+((ereportDto.getGraphHoldExit()-ereportDto.getGraphHoldEntry())/2); list.add(new Double(ereportDto.getGraphTimeAt120NM())); list.add(new Double(ereportDto.getGraphHoldEntry())); list.add(new Double(medianVal)); list.add(new Double(ereportDto.getGraphHoldExit())); list.add(new Double(ereportDto.getGraphLandedTime())); } } dataset.add(list, graph, graph); } return dataset; } 

Answer 1

A non-standard extension has been made so that the radius of emissions can be set. Set it to 0 and they are gone.

 package de.vontrostorff.kivsproject.util; import lombok.Getter; import lombok.Setter; import org.jfree.chart.axis.CategoryAxis; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.entity.EntityCollection; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.renderer.Outlier; import org.jfree.chart.renderer.OutlierList; import org.jfree.chart.renderer.OutlierListCollection; import org.jfree.chart.renderer.category.BoxAndWhiskerRenderer; import org.jfree.chart.renderer.category.CategoryItemRendererState; import org.jfree.chart.ui.RectangleEdge; import org.jfree.data.category.CategoryDataset; import org.jfree.data.statistics.BoxAndWhiskerCategoryDataset; import java.awt.*; import java.awt.geom.Ellipse2D; import java.awt.geom.Line2D; import java.awt.geom.Point2D; import java.awt.geom.Rectangle2D; import java.util.ArrayList; import java.util.Collections; import java.util.Iterator; import java.util.List; public class CustomBoxAndWhiskerRenderer extends BoxAndWhiskerRenderer { private Double outlierRadius; public Double getOutlierRadius() { return outlierRadius; } public void setOutlierRadius(Double outlierRadius) { this.outlierRadius = outlierRadius; } @Override public void drawVerticalItem(Graphics2D g2, CategoryItemRendererState state, Rectangle2D dataArea, CategoryPlot plot, CategoryAxis domainAxis, ValueAxis rangeAxis, CategoryDataset dataset, int row, int column) { BoxAndWhiskerCategoryDataset bawDataset = (BoxAndWhiskerCategoryDataset) dataset; double categoryEnd = domainAxis.getCategoryEnd(column, getColumnCount(), dataArea, plot.getDomainAxisEdge()); double categoryStart = domainAxis.getCategoryStart(column, getColumnCount(), dataArea, plot.getDomainAxisEdge()); double categoryWidth = categoryEnd - categoryStart; double xx = categoryStart; int seriesCount = getRowCount(); int categoryCount = getColumnCount(); if (seriesCount > 1) { double seriesGap = dataArea.getWidth() * getItemMargin() / (categoryCount * (seriesCount - 1)); double usedWidth = (state.getBarWidth() * seriesCount) + (seriesGap * (seriesCount - 1)); // offset the start of the boxes if the total width used is smaller // than the category width double offset = (categoryWidth - usedWidth) / 2; xx = xx + offset + (row * (state.getBarWidth() + seriesGap)); } else { // offset the start of the box if the box width is smaller than the // category width double offset = (categoryWidth - state.getBarWidth()) / 2; xx = xx + offset; } double yyAverage; double yyOutlier; Paint itemPaint = getItemPaint(row, column); g2.setPaint(itemPaint); Stroke s = getItemStroke(row, column); g2.setStroke(s); double aRadius = 0; // average radius RectangleEdge location = plot.getRangeAxisEdge(); Number yQ1 = bawDataset.getQ1Value(row, column); Number yQ3 = bawDataset.getQ3Value(row, column); Number yMax = bawDataset.getMaxRegularValue(row, column); Number yMin = bawDataset.getMinRegularValue(row, column); Shape box = null; if (yQ1 != null && yQ3 != null && yMax != null && yMin != null) { double yyQ1 = rangeAxis.valueToJava2D(yQ1.doubleValue(), dataArea, location); double yyQ3 = rangeAxis.valueToJava2D(yQ3.doubleValue(), dataArea, location); double yyMax = rangeAxis.valueToJava2D(yMax.doubleValue(), dataArea, location); double yyMin = rangeAxis.valueToJava2D(yMin.doubleValue(), dataArea, location); double xxmid = xx + state.getBarWidth() / 2.0; double halfW = (state.getBarWidth() / 2.0) * getWhiskerWidth(); // draw the body... box = new Rectangle2D.Double(xx, Math.min(yyQ1, yyQ3), state.getBarWidth(), Math.abs(yyQ1 - yyQ3)); if (getFillBox()) { g2.fill(box); } Paint outlinePaint = getItemOutlinePaint(row, column); if (getUseOutlinePaintForWhiskers()) { g2.setPaint(outlinePaint); } // draw the upper shadow... g2.draw(new Line2D.Double(xxmid, yyMax, xxmid, yyQ3)); g2.draw(new Line2D.Double(xxmid - halfW, yyMax, xxmid + halfW, yyMax)); // draw the lower shadow... g2.draw(new Line2D.Double(xxmid, yyMin, xxmid, yyQ1)); g2.draw(new Line2D.Double(xxmid - halfW, yyMin, xxmid + halfW, yyMin)); g2.setStroke(getItemOutlineStroke(row, column)); g2.setPaint(outlinePaint); g2.draw(box); } g2.setPaint(getArtifactPaint()); // draw mean - SPECIAL AIMS REQUIREMENT... if (isMeanVisible()) { Number yMean = bawDataset.getMeanValue(row, column); if (yMean != null) { yyAverage = rangeAxis.valueToJava2D(yMean.doubleValue(), dataArea, location); aRadius = state.getBarWidth() / 4; // here we check that the average marker will in fact be // visible before drawing it... if ((yyAverage > (dataArea.getMinY() - aRadius)) && (yyAverage < (dataArea.getMaxY() + aRadius))) { Ellipse2D.Double avgEllipse = new Ellipse2D.Double( xx + aRadius, yyAverage - aRadius, aRadius * 2, aRadius * 2); g2.fill(avgEllipse); g2.draw(avgEllipse); } } } // draw median... if (isMedianVisible()) { Number yMedian = bawDataset.getMedianValue(row, column); if (yMedian != null) { double yyMedian = rangeAxis.valueToJava2D( yMedian.doubleValue(), dataArea, location); g2.draw(new Line2D.Double(xx, yyMedian, xx + state.getBarWidth(), yyMedian)); } } // draw yOutliers... double maxAxisValue = rangeAxis.valueToJava2D( rangeAxis.getUpperBound(), dataArea, location) + aRadius; double minAxisValue = rangeAxis.valueToJava2D( rangeAxis.getLowerBound(), dataArea, location) - aRadius; g2.setPaint(itemPaint); // draw outliers double oRadius = outlierRadius == null? state.getBarWidth()/3: outlierRadius; // outlier radius java.util.List outliers = new ArrayList(); OutlierListCollection outlierListCollection = new OutlierListCollection(); // From outlier array sort out which are outliers and put these into a // list If there are any farouts, set the flag on the // OutlierListCollection List yOutliers = bawDataset.getOutliers(row, column); if (yOutliers != null) { for (int i = 0; i < yOutliers.size(); i++) { double outlier = ((Number) yOutliers.get(i)).doubleValue(); Number minOutlier = bawDataset.getMinOutlier(row, column); Number maxOutlier = bawDataset.getMaxOutlier(row, column); Number minRegular = bawDataset.getMinRegularValue(row, column); Number maxRegular = bawDataset.getMaxRegularValue(row, column); if (outlier > maxOutlier.doubleValue()) { outlierListCollection.setHighFarOut(true); } else if (outlier < minOutlier.doubleValue()) { outlierListCollection.setLowFarOut(true); } else if (outlier > maxRegular.doubleValue()) { yyOutlier = rangeAxis.valueToJava2D(outlier, dataArea, location); outliers.add(new Outlier(xx + state.getBarWidth() / 2.0, yyOutlier, oRadius)); } else if (outlier < minRegular.doubleValue()) { yyOutlier = rangeAxis.valueToJava2D(outlier, dataArea, location); outliers.add(new Outlier(xx + state.getBarWidth() / 2.0, yyOutlier, oRadius)); } Collections.sort(outliers); } // Process outliers. Each outlier is either added to the // appropriate outlier list or a new outlier list is made for (Iterator iterator = outliers.iterator(); iterator.hasNext();) { Outlier outlier = (Outlier) iterator.next(); outlierListCollection.add(outlier); } for (Iterator iterator = outlierListCollection.iterator(); iterator.hasNext();) { OutlierList list = (OutlierList) iterator.next(); Outlier outlier = list.getAveragedOutlier(); Point2D point = outlier.getPoint(); if (list.isMultiple()) { drawMultipleEllipse(point, state.getBarWidth(), oRadius, g2); } else { drawEllipse(point, oRadius, g2); } } // draw farout indicators if (outlierListCollection.isHighFarOut()) { drawHighFarOut(aRadius / 2.0, g2, xx + state.getBarWidth() / 2.0, maxAxisValue); } if (outlierListCollection.isLowFarOut()) { drawLowFarOut(aRadius / 2.0, g2, xx + state.getBarWidth() / 2.0, minAxisValue); } } // collect entity and tool tip information... if (state.getInfo() != null && box != null) { EntityCollection entities = state.getEntityCollection(); if (entities != null) { addItemEntity(entities, dataset, row, column, box); } } } /** * Draws two dots to represent the average value of more than one outlier. * * @param point the location * @param boxWidth the box width. * @param oRadius the radius. * @param g2 the graphics device. */ private void drawMultipleEllipse(Point2D point, double boxWidth, double oRadius, Graphics2D g2) { Ellipse2D dot1 = new Ellipse2D.Double(point.getX() - (boxWidth / 2) + oRadius, point.getY(), oRadius, oRadius); Ellipse2D dot2 = new Ellipse2D.Double(point.getX() + (boxWidth / 2), point.getY(), oRadius, oRadius); g2.draw(dot1); g2.draw(dot2); } /** * Draws a dot to represent an outlier. * * @param point the location. * @param oRadius the radius. * @param g2 the graphics device. */ private void drawEllipse(Point2D point, double oRadius, Graphics2D g2) { Ellipse2D dot = new Ellipse2D.Double(point.getX() + oRadius / 2, point.getY(), oRadius, oRadius); g2.draw(dot); } /** * Draws a triangle to indicate the presence of far-out values. * * @param aRadius the radius. * @param g2 the graphics device. * @param xx the x coordinate. * @param m the y coordinate. */ private void drawHighFarOut(double aRadius, Graphics2D g2, double xx, double m) { double side = aRadius * 2; g2.draw(new Line2D.Double(xx - side, m + side, xx + side, m + side)); g2.draw(new Line2D.Double(xx - side, m + side, xx, m)); g2.draw(new Line2D.Double(xx + side, m + side, xx, m)); } /** * Draws a triangle to indicate the presence of far-out values. * * @param aRadius the radius. * @param g2 the graphics device. * @param xx the x coordinate. * @param m the y coordinate. */ private void drawLowFarOut(double aRadius, Graphics2D g2, double xx, double m) { double side = aRadius * 2; g2.draw(new Line2D.Double(xx - side, m - side, xx + side, m - side)); g2.draw(new Line2D.Double(xx - side, m - side, xx, m)); g2.draw(new Line2D.Double(xx + side, m - side, xx, m)); } }