Plot Chart from a Txt file
 

Hello my friends

I have a txt file with the follow layout
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);   

        }   



}

Re: Plot Chart from a Txt file
 

and your point is???

Re: Plot Chart from a Txt file
 

Hi there...

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

Re: Plot Chart from a Txt file
 

The graph shows just fine for me.

Re: Plot Chart from a Txt file
 

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

:-O

Re: Plot Chart from a Txt file
 

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

Re: Plot Chart from a Txt file
 

It was not plotting the data imported from the file,,,
the file contents...
it looks like this.... 1st column is the error description and the second the quantity...

:) sorry about my fail

Re: Plot Chart from a Txt file
 

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.

Re: Plot Chart from a Txt file
 

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?? :(

Re: Plot Chart from a Txt file
 

something like this^??????

JFreeChart chart = ChartFactory.createBarChart(