?
Solved

drawing back to origin...

Posted on 2009-04-08
6
Medium Priority
?
465 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();
  }
}

Open in new window

0
Comment
Question by:shragi
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 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 2000 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();
  }
}

Open in new window

0
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 

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

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
Are you developing a Java application and want to create Excel Spreadsheets? You have come to the right place, this article will describe how you can create Excel Spreadsheets from a Java Application. For the purposes of this article, I will be u…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
The viewer will learn how to implement Singleton Design Pattern in Java.
Suggested Courses
Course of the Month12 days, 6 hours left to enroll

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question