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drawing back to origin...

Posted on 2009-04-08
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459 Views
Last Modified: 2012-05-06
I wrote a code to draw jfreechart... but there is one problem with it...

I am able to draw the graph for all the input values in the file...but after drawing all the values it is drawing back to origin..

what i mean is after plotting the last point it is taking (0,0) as next point and coming back...

so plz correct my code...
import java.io.*;

import javax.swing.JFrame;

import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartPanel;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.xy.DefaultXYDataset;

import org.jfree.data.xy.XYBarDataset;

 

public class DisplayGraphics 

{	

  class ReadFile

  { 	

  	int kMaxLines = 60000; 	 	

  	double[][] valuePairs = new double[2][kMaxLines];

  	public void fileRead()

  	{

   		try  		

  		{  	

  	 		int kMaxLines = 60000;  

	   		FileInputStream fstream = new FileInputStream("c:/perl/output.txt");

	   		DataInputStream datastream = new DataInputStream(fstream);

	   		BufferedReader br = new BufferedReader(new InputStreamReader(datastream));

	   		String strLine;

	   		int line = 0;

	   		while ((strLine = br.readLine()) != null)

		 		{

	   			String temp_strs[] = strLine.split("\t");

	  			for (int j = 0; j < 2; j++)

	  				valuePairs[j][line] = Double.parseDouble(temp_strs[j]);

	  			//System.out.println(temp_strs[0] + " " + temp_strs[1]);

	  			line++;

	   		}

	 	 		datastream.close();

  		}

  		catch (Exception e)

  		{

  	    //file not found exception...

  			e.printStackTrace();

  		}

  	}

  }

  

  public void drawGraph()

  {

  	ReadFile rFile= new ReadFile();

  	rFile.fileRead();

  	DefaultXYDataset set = new DefaultXYDataset();

  	//addseries requires double array

    set.addSeries("Values" , rFile.valuePairs);

    //wrapper class that converts a standard XYDataset, 

    //into an IntervalXYDataset suitable for use in creating XY bar charts

    XYBarDataset barset = new XYBarDataset(set , 0.8);

    JFreeChart chart = ChartFactory.createXYBarChart(

    		"coverage depth" , "x" , false , "y" , 

        barset , PlotOrientation.VERTICAL , true , true , false);

    JFrame frame = new JFrame("Graph Showing Coverage values for chromosome-9");

    frame.setContentPane(new ChartPanel(chart));

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.pack();

    frame.setVisible(true);   

  }

 

  public static void main(String[] args)

  {

  	DisplayGraphics XY = new DisplayGraphics();

  	XY.drawGraph();

  }

}

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Comment
Question by:shragi
  • 3
  • 2
6 Comments
 
LVL 92

Expert Comment

by:objects
ID: 24104153
you need to adjust the size of your array to match the number od data points
I'd suggest reading the points into a List and creating your aray from that list

http://helpdesk.objects.com.au/java/how-do-i-read-a-text-file-line-by-line-into-a-list
0
 

Author Comment

by:shragi
ID: 24104363
can u tell how to do ..that.. the link u had provided is understandable...but I am unable to make it to my code....so can u make those changes to my code ...
0
 
LVL 25

Accepted Solution

by:
InteractiveMind earned 500 total points
ID: 24107823
Try,
import java.io.*;

import java.util.*;

import javax.swing.JFrame;

import org.jfree.chart.ChartFactory;

import org.jfree.chart.ChartPanel;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.xy.DefaultXYDataset;

import org.jfree.data.xy.XYBarDataset;

 

public class DisplayGraphics 

{       

  class ReadFile

  {     

        double[][] valuePairs;

        public void fileRead()

        {

		ArrayList<Double> temp1=new ArrayList<Double>(60000);

		ArrayList<Double> temp2=new ArrayList<Double>(60000);

                try             

                {         

                        FileInputStream fstream = new FileInputStream("c:/perl/output.txt");

                        DataInputStream datastream = new DataInputStream(fstream);

                        BufferedReader br = new BufferedReader(new InputStreamReader(datastream));

                        String strLine;

                        while ((strLine = br.readLine()) != null)

                                {

                                String temp_strs[] = strLine.split("\t");

				temp1.add(Double.parseDouble(temp_strs[0]);

				temp2.add(Double.parseDouble(temp_strs[1]);

                        }

                        datastream.close();

                }

                catch (Exception e)

                {

            //file not found exception...

                        e.printStackTrace();

                }

		valuePairs=new double[2][temp1.size()];

		//now populate the array

		for(int i=0; i<temp1.size(); i++)

		{

			valuePairs[0][i]=temp1.get(i);

			valuePairs[1][i]=temp2.get(i);

		}

		temp1.clear();//cleanup

		temp2.clear();//

        }

  }

  

  public void drawGraph()

  {

        ReadFile rFile= new ReadFile();

        rFile.fileRead();

        DefaultXYDataset set = new DefaultXYDataset();

        //addseries requires double array

    set.addSeries("Values" , rFile.valuePairs);

    //wrapper class that converts a standard XYDataset, 

    //into an IntervalXYDataset suitable for use in creating XY bar charts

    XYBarDataset barset = new XYBarDataset(set , 0.8);

    JFreeChart chart = ChartFactory.createXYBarChart(

                "coverage depth" , "x" , false , "y" , 

        barset , PlotOrientation.VERTICAL , true , true , false);

    JFrame frame = new JFrame("Graph Showing Coverage values for chromosome-9");

    frame.setContentPane(new ChartPanel(chart));

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.pack();

    frame.setVisible(true);   

  }

 

  public static void main(String[] args)

  {

        DisplayGraphics XY = new DisplayGraphics();

        XY.drawGraph();

  }

}

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Author Comment

by:shragi
ID: 24108708
I got a numbe format exception...at

temp1.add(Double.parseDouble(temp_strs[0]);
temp2.add(Double.parseDouble(temp_strs[1]);

but unable to fix it...can u..
0
 

Author Comment

by:shragi
ID: 24109644
yup i got..it... thnks dude...
0
 
LVL 25

Expert Comment

by:InteractiveMind
ID: 24109872
Replace those lines with

try
{
    temp1.add(Double.parseDouble(temp_strs[0]);
    temp2.add(Double.parseDouble(temp_strs[1]);
}catch(Exception e2){System.out.println(temp_strs[0]+","+temp_strs[1]);}

are they definitely numbers?

0

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