Log Scale axis values not vissible

[plunavat]

Hello,

I am plotting a scatter graph on Logarithmic scale. I have two issues,
1. how to display axis values of all grid lines (say 10, 20, 30, 40, 50, 60, 70, 80,90,100, etc). In the image below only only 10, 20, 30 are shown on x-axis and only 100 is shown on y-axis. values are not shown in spite of space available. how do we show all values
2. there is a vertical line drawn automatically from first point to x-axis. why this is so and how to remove the same

please find my code

Code: Select all

import java.awt.BasicStroke;
import java.awt.Color;
import java.io.File;
import java.io.IOException;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.LogarithmicAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYAreaRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

public class TombStone
{
    public static void main(String[] args)
    {
        XYSeriesCollection dataset = new XYSeriesCollection();
        XYSeries series1 = new XYSeries("Series1", false);
        XYSeries series2 = new XYSeries("Series2", false);
        
        series1.add(11.05, 68.3943598346066);
        series1.add(12.748000000000001, 67.95148610202949);
        series1.add(14.446000000000002, 67.24794119191404);
        series1.add(16.144000000000002, 66.17590816044844);
        series1.add(17.842000000000002, 64.62757006382091);
        series1.add(19.540000000000003, 62.49510995821963);
        series1.add(21.238000000000003, 59.67071089983283);
        series1.add(22.936000000000003, 56.04655594484873);
        series1.add(24.634000000000004, 51.51482814945548);
        series1.add(26.332000000000004, 45.96771056984136);
        series1.add(22.709000000000007, 28.465098606756115);
        series1.add(21.188000000000006, 31.773494803834645);
        series1.add(19.667000000000005, 34.42410482299617);
        series1.add(18.146000000000004, 36.492438103906416);
        series1.add(16.625000000000004, 38.05400408623117);
        series1.add(15.104000000000003, 39.18431220963617);
        series1.add(13.583000000000002, 39.95887191378719);
        series1.add(12.062000000000001, 40.45319263834999);
        series1.add(10.541, 40.742783822990326);
        series1.add(9.02, 40.90315490737396);
        series1.add(11.05, 68.3943598346066);
       
        series2.add(100.77, 112.54828229576532);
        series2.add(123.713, 111.69715738364643);
        series2.add(146.656, 110.5461787622396);
        series2.add(169.59900000000002, 109.02365342951693);
        series2.add(192.54200000000003, 107.05788838345033);
        series2.add(215.48500000000004, 104.57719062201186);
        series2.add(238.42800000000005, 101.50986714317352);
        series2.add(261.37100000000004, 97.78422494490731);
        series2.add(284.314, 93.32857102518527);
        series2.add(307.257, 88.0712123819794);
        series2.add(330.2, 81.94045601326167);
        series2.add(282.41999999999996, 53.142467758918784);
        series2.add(263.23099999999994, 56.69400203886005);
        series2.add(244.04199999999994, 59.79428737361263);
        series2.add(224.85299999999995, 62.47911018230234);
        series2.add(205.66399999999996, 64.78425688405494);
        series2.add(186.47499999999997, 66.74551389799623);
        series2.add(167.28599999999997, 68.39866764325201);
        series2.add(148.09699999999998, 69.77950453894806);
        series2.add(128.908, 70.92381100421018);
        series2.add(109.719, 71.86737345816412);
        series2.add(90.53, 72.64597831993572);
        series2.add(100.77, 112.54828229576532);
        
        dataset.addSeries(series1);
        dataset.addSeries(series2);
        
        JFreeChart chart = ChartFactory.createXYLineChart("Title", "X", "Y", dataset, PlotOrientation.VERTICAL, false, true, false);

        XYPlot plot = (XYPlot) chart.getPlot();
        plot.setForegroundAlpha(0.5f);
        plot.setBackgroundPaint(new Color(255, 255, 255, 255));

        plot.setDomainGridlinePaint(new Color(128, 128, 128));
        plot.setDomainGridlineStroke(new BasicStroke(1.2f));

        plot.setDomainMinorGridlinesVisible(true);
        plot.setDomainMinorGridlineStroke(new BasicStroke(0.0f));
        plot.setDomainMinorGridlinePaint(Color.BLACK);

        plot.setRangeGridlinePaint(new Color(128, 128, 128));
        plot.setRangeGridlineStroke(new BasicStroke(1.2f));
        plot.setRangeGridlinesVisible(true);
        plot.setRangeMinorGridlinesVisible(true);
        plot.setRangeMinorGridlineStroke(new BasicStroke(1.0f));
        plot.setRangeMinorGridlinePaint(Color.BLACK);

        LogarithmicAxis xAxis = new LogarithmicAxis("Flow [m3/hr]");
        LogarithmicAxis yAxis = new LogarithmicAxis("Head [m]");
        
        plot.setDomainAxis(xAxis);
        plot.setRangeAxis(yAxis);
        
        XYAreaRenderer renderer = new XYAreaRenderer();
        for (int i = 0; i < dataset.getSeriesCount(); i++)
        {
            renderer.setSeriesOutlinePaint(i, Color.black);
            renderer.setSeriesOutlineStroke(i, new BasicStroke(1.2f));
            renderer.setOutline(true);
            renderer.setSeriesPaint(i, new Color(217, 217, 217, 217));
        }
        renderer.setAutoPopulateSeriesFillPaint(false);
        plot.setRenderer(renderer);
        
       
        try
        {
            File file = new File("D:\\chart.png");
            if (!file.exists())
            {
                file.createNewFile();
            }
            ChartUtilities.saveChartAsPNG(file, chart, 900, 500);
        }
        catch (Exception  e)
        {
            e.printStackTrace();
        }
    }
}

Image


Any help would be appreciated

Thanks & Regards,
Pranav C Lunavat

[plunavat]

Hello,

can anybody please help on the above issue.

Regards,
Pranav C Lunavat

[david.gilbert]

I would try LogAxis rather than LogarithmicAxis, usually it gives better results. For the data plot, I don't think you'll get what you are looking for using the XYAreaRenderer. I changed your code to use an XYLineAndShapeRenderer and get better results, although if you want to fill the regions you'll probably need to use an XYShapeAnnotation or create your own custom renderer.

Code: Select all

import java.awt.BasicStroke;
import java.awt.Color;
import java.io.File;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.LogAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

public class Tombstone
{
    public static void main(String[] args)
    {
        XYSeriesCollection dataset = new XYSeriesCollection();
        XYSeries series1 = new XYSeries("Series1", false);
        XYSeries series2 = new XYSeries("Series2", false);
        
        series1.add(11.05, 68.3943598346066);
        series1.add(12.748000000000001, 67.95148610202949);
        series1.add(14.446000000000002, 67.24794119191404);
        series1.add(16.144000000000002, 66.17590816044844);
        series1.add(17.842000000000002, 64.62757006382091);
        series1.add(19.540000000000003, 62.49510995821963);
        series1.add(21.238000000000003, 59.67071089983283);
        series1.add(22.936000000000003, 56.04655594484873);
        series1.add(24.634000000000004, 51.51482814945548);
        series1.add(26.332000000000004, 45.96771056984136);
        series1.add(22.709000000000007, 28.465098606756115);
        series1.add(21.188000000000006, 31.773494803834645);
        series1.add(19.667000000000005, 34.42410482299617);
        series1.add(18.146000000000004, 36.492438103906416);
        series1.add(16.625000000000004, 38.05400408623117);
        series1.add(15.104000000000003, 39.18431220963617);
        series1.add(13.583000000000002, 39.95887191378719);
        series1.add(12.062000000000001, 40.45319263834999);
        series1.add(10.541, 40.742783822990326);
        series1.add(9.02, 40.90315490737396);
        series1.add(11.05, 68.3943598346066);
       
        series2.add(100.77, 112.54828229576532);
        series2.add(123.713, 111.69715738364643);
        series2.add(146.656, 110.5461787622396);
        series2.add(169.59900000000002, 109.02365342951693);
        series2.add(192.54200000000003, 107.05788838345033);
        series2.add(215.48500000000004, 104.57719062201186);
        series2.add(238.42800000000005, 101.50986714317352);
        series2.add(261.37100000000004, 97.78422494490731);
        series2.add(284.314, 93.32857102518527);
        series2.add(307.257, 88.0712123819794);
        series2.add(330.2, 81.94045601326167);
        series2.add(282.41999999999996, 53.142467758918784);
        series2.add(263.23099999999994, 56.69400203886005);
        series2.add(244.04199999999994, 59.79428737361263);
        series2.add(224.85299999999995, 62.47911018230234);
        series2.add(205.66399999999996, 64.78425688405494);
        series2.add(186.47499999999997, 66.74551389799623);
        series2.add(167.28599999999997, 68.39866764325201);
        series2.add(148.09699999999998, 69.77950453894806);
        series2.add(128.908, 70.92381100421018);
        series2.add(109.719, 71.86737345816412);
        series2.add(90.53, 72.64597831993572);
        series2.add(100.77, 112.54828229576532);
        
        dataset.addSeries(series1);
        dataset.addSeries(series2);
        
        JFreeChart chart = ChartFactory.createXYLineChart("Title", "X", "Y", dataset, PlotOrientation.VERTICAL, false, true, false);

        XYPlot plot = (XYPlot) chart.getPlot();
        //plot.setForegroundAlpha(0.5f);
        plot.setBackgroundPaint(new Color(255, 255, 255, 255));

        plot.setDomainGridlinePaint(new Color(128, 128, 128));
        plot.setDomainGridlineStroke(new BasicStroke(1.2f));

        plot.setDomainMinorGridlinesVisible(true);
        plot.setDomainMinorGridlineStroke(new BasicStroke(0.0f));
        plot.setDomainMinorGridlinePaint(Color.BLACK);

        plot.setRangeGridlinePaint(new Color(128, 128, 128));
        plot.setRangeGridlineStroke(new BasicStroke(1.2f));
        plot.setRangeGridlinesVisible(true);
        //plot.setRangeMinorGridlinesVisible(true);
        //plot.setRangeMinorGridlineStroke(new BasicStroke(1.0f));
        //plot.setRangeMinorGridlinePaint(Color.BLACK);

        LogAxis xAxis = new LogAxis("Flow [m3/hr]");
        LogAxis yAxis = new LogAxis("Head [m]");
        
        plot.setDomainAxis(xAxis);
        plot.setRangeAxis(yAxis);
        
        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
        for (int i = 0; i < dataset.getSeriesCount(); i++)
        {
            renderer.setSeriesStroke(i, new BasicStroke(2.0f));
            renderer.setBaseShapesVisible(false);
            //renderer.setSeriesOutlinePaint(i, Color.black);
            //renderer.setSeriesOutlineStroke(i, new BasicStroke(1.2f));
            //renderer.setOutline(true);
            renderer.setSeriesPaint(i, Color.RED);
        }
        renderer.setAutoPopulateSeriesFillPaint(false);
        plot.setRenderer(renderer);
        
       
        try
        {
            File file = new File("chart.png");
            if (!file.exists())
            {
                file.createNewFile();
            }
            ChartUtilities.saveChartAsPNG(file, chart, 900, 500);
        }
        catch (Exception  e)
        {
            e.printStackTrace();
        }
    }
}

[larchicha]

I'll take that...

Thank you, David.

[plunavat]

Thanks David for your solution.
but i see two things happening,
1. the axis becomes equidistant v/s the image attached above (where the distance is more initially and then reduces gradually)
2. instead of whole numbers in axis it shows 10^0.9 and so on.

i would require the output in the same fashion as image attached before

looking for some help

Thanks & Regards
Pranav C Lunavat

[plunavat]

Hello,

how can we display the axis values on logarithmic axis in above image. Like on Y axis there is lot of space to show the values as 10,20, etc but still it is not showing

Thanks & Regards,
Pranav C Lunavat