Plot Chart from a Txt file

[jorgeflorencio]

Hello my friends

I have a txt file with the follow layout
error1 255
error2 34
error5 111
error3 23

and what i'm trying to achieve is, from this text file plot a trend chart with the errors and respective quantity!

this is the code that i'm using.... import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.*;
import java.util.*;
import java.lang.NumberFormatException;
import java.text.NumberFormat;
import java.text.MessageFormat;

import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.data.*;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.data.DomainOrder;
import org.jfree.data.general.SeriesDataset;
import org.jfree.data.category.DefaultCategoryDataset;


public class graph extends JFrame{

/**
*
*/
private static final long serialVersionUID = 0L;

public graph(String title) throws Exception{

super(title);

XYDataset dataset = createDataset();
JFreeChart chart = createChart(dataset);
ChartPanel chartPanel = new ChartPanel(chart);
chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(chartPanel);
chartPanel.setMouseZoomable(true, false);
}


// Well, here I read a file from a table in txt each line with 4 columns of numbers), save it in a string and then on a string
// Array of 4 elements. Then convert each element of the string to double (not know if I'm being very stupid, I am more beginner in java ...)
// What I'm trying to do is get two of those column (now in double) and put points on the method series.add below
// I think I have to do a loop of some way, then do what you suggested q ... But the loop that I did overwrite the variables
// My attempt was a normal access to the txt file

/* public extrator extract(String) throws Exception {
File file = new File("F:\\Ekralog.txt");
FileInputStream in = new FileInputStream(file);
InputStreamReader convert = new InputStreamReader(in);
BufferedReader bf = new BufferedReader(convert);
String line;
String[] element;
line = bf.readLine();
element = line.split("[\\s]+");
bf.close();
in.close();return

*/


private XYDataset createDataset() throws Exception {
//CONVERT STRING TO DOUBLE
//double element0;
//element0 = Double.parseDouble(element[0]); /* element[0] its one string*/

XYSeries series1 = new XYSeries("TRZ");
series1.add(1.0, 1.0); // some point that i've inserted to test and it is
series1.add(2.0, 4.0);// should i do a loop to test it.. there are more than 100 points
series1.add(3.0, 3.0);
series1.add(4.0, 5.0);
series1.add(5.0, 5.0);
series1.add(6.0, 7.0);
series1.add(7.0, 7.0);
series1.add(8.0, 8.0);



XYSeriesCollection dataset = new XYSeriesCollection();
dataset.addSeries(series1);

return dataset;


}
// ListDouble colunas = new ArrayListDouble();

//public ListDouble getColunas(){

// return colunas;

// }


private JFreeChart createChart(XYDataset dataset) {
// create the chart...
JFreeChart chart = ChartFactory.createXYLineChart(
"Medida", // chart title
"X", // x axis label
"Y", // y axis label
dataset, // data
PlotOrientation.VERTICAL,
true, // include legend
true, // tooltips
false // urls

);

return chart;
}

public static void main(String[] args) throws Exception {
graph teste = new graph("test");
teste.pack();
teste.setVisible(true);
}

}

[stultuske]

and your point is???

[jorgeflorencio]

and your point is???

Hi there...

The graphic is not plotting can anyone help me to find where is the problem...

[Ezzaral]

The graph shows just fine for me.

[jorgeflorencio]

The graph shows just fine for me.

Really... it getting the data from the txt file ?

:-O

[Ezzaral]

No of course not. I don't have that file and you have it commented out. You said the graphic was not plotting.

[jorgeflorencio]

No of course not. I don't have that file and you have it commented out. You said the graphic was not plotting.

It was not plotting the data imported from the file,,,
the file contents...error1 255
error2 34
error5 111
error3 23

it looks like this.... 1st column is the error description and the second the quantity...

:) sorry about my fail

[Ezzaral]

I don't think you want an XYSeries for that. If you want it to be a line chart (bar chart seems more appropriate to me, but you seem to want the line chart), try this instead

private CategoryDataset createDataset() throws Exception {

    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.addValue(255, "Errors", "error1");
    dataset.addValue(34, "Errors", "error2");
    dataset.addValue(111, "Errors", "error5");
    dataset.addValue(23, "Errors", "error3");

    return dataset;
}

private JFreeChart createChart(CategoryDataset dataset) {
    // create the chart...
    JFreeChart chart = ChartFactory.createLineChart(
            "Medida", // chart title
            "Error Code", // x axis label
            "Count", // y axis label
            dataset, // data
            PlotOrientation.VERTICAL,
            true, // include legend
            true, // tooltips
            false // urls
    );

    return chart;
}

All you have to do is build that category dataset with the first and second elements of your spilt() on the text file line.

[jorgeflorencio]

You are right... i want a bar chart... but as a newby i'm still trying to discover to potential of the javafreechart... reading trying reading trying... i'm too slowwww...

thank you for your lights...~

to change for a bar type what should i dooo?? :(

I don't think you want an XYSeries for that. If you want it to be a line chart (bar chart seems more appropriate to me, but you seem to want the line chart), try this instead

private CategoryDataset createDataset() throws Exception {

    DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    dataset.addValue(255, "Errors", "error1");
    dataset.addValue(34, "Errors", "error2");
    dataset.addValue(111, "Errors", "error5");
    dataset.addValue(23, "Errors", "error3");

    return dataset;
}

private JFreeChart createChart(CategoryDataset dataset) {
    // create the chart...
    JFreeChart chart = ChartFactory.createLineChart(
            "Medida", // chart title
            "Error Code", // x axis label
            "Count", // y axis label
            dataset, // data
            PlotOrientation.VERTICAL,
            true, // include legend
            true, // tooltips
            false // urls
    );

    return chart;
}

All you have to do is build that category dataset with the first and second elements of your spilt() on the text file line.

[jorgeflorencio]

something like this^??????

JFreeChart chart = ChartFactory.createBarChart(

[Ezzaral]

There is a bar chart demo file in the source\org\jfree\chart\demo directory of JFreeChart.

[jorgeflorencio]

There is a bar chart demo file in the source\org\jfree\chart\demo directory of JFreeChart.

thank you once again....

my problem is allways with the collectage of the data from the txt file....

thank you

[Ezzaral]

You already have the basic part of that in place. Read each line of the file, use split() to separate the elements, then add that pair of values to your series for the chart.

[sadikds]

please tell me steps to draw bar graph from a file values using java and also code....

[stultuske]

please tell me steps to draw bar graph from a file values using java and also code....

you want to use Java AND code? now, that 'll be a tough one I bet.
I'll give you the first couple of steps though:
1. try yourself
2. when you get in trouble, start a NEW thread, show us your efforts so we can see where you're going wrong
3. but hey, just read the thread you're replying to, everything you need can be derived from it