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(

Re: Plot Chart from a Txt file
 

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

Re: Plot Chart from a Txt file
 

thank you once again....

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

thank you

Re: Plot Chart from a Txt file
 

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.