Solved

drawing back to origin...

Posted on 2009-04-08
6
460 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
  • 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();
  }
}

Open in new window

0
Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

 

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

ScreenConnect 6.0 Free Trial

Discover new time-saving features in one game-changing release, ScreenConnect 6.0, based on partner feedback. New features include a redesigned UI, app configurations and chat acknowledgement to improve customer engagement!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
rhino JavaScript import, load 25 82
web services creation SOAP vs REST 5 40
jdbc error in jsp application 20 45
jsp login check 12 31
Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
The viewer will learn how to implement Singleton Design Pattern in Java.

773 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