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Your preferred data manipulation and analysis language for CSV.

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/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */

package ai.preferred.regression;

import ai.preferred.regression.io.ARFFDataReader;
import ai.preferred.regression.plot.XYChart;
import org.jfree.data.xy.XYSeries;
import org.kohsuke.args4j.Option;
import weka.core.Instance;
import weka.core.Instances;

import javax.swing.*;
import java.io.File;

public class PlotData extends Command {

  @Option(name = "-i", aliases = {"--input"}, usage = "the path to the input CSV file", required = true)
  private File input;

  @Option(name = "-n", aliases = {"--name"}, usage = "the name of the plot")
  private String name = "DATA";

  @Option(name = "-h", aliases = {"--header"}, usage = "specifies if the input CSV files have headers")
  private boolean header = true;

  @Override
  protected void exec() throws Exception {
    final ARFFDataReader reader = new ARFFDataReader(input, false, header);
    final Instances data = reader.read(input);

    final XYSeries dataSeries = new XYSeries("DATA");
    for (final Instance datum : data) {
      dataSeries.add(datum.value(1), datum.value(0));
    }

    final XYChart chart = new XYChart(name, dataSeries, new XYSeries("REGRESSION"));
    chart.pack();
    chart.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    chart.setVisible(true);
  }

  public static void main(String[] args) {
    parseArgsAndRun(PlotData.class, args);
  }

}