Hall.java

import java.io.*;
import java.util.*;

public class Hall{

   // private static final int rows=8;
   // private static final int cols=2;

    public static void main (String[] args) throws IOException {


        if(args.length>0){

            BufferedReader xReader=new BufferedReader(new FileReader(IOUtil.fileName(args[0])));
            BufferedReader yReader=new BufferedReader(new FileReader(IOUtil.fileName(args[1])));
            Scanner xScan = new Scanner(xReader);
            Scanner yScan = new Scanner(yReader);
            float xData[][] = new float[16][1];
            float yData[][] = new float[16][1];
            data(xData,xScan);
            data(yData,yScan);

            PrintWriter outFile = new PrintWriter(new FileWriter("Residuals.dat"));
            //PrintWriter outComp = new PrintWriter(new FileWriter("FullGraph.dat"));

        System.out.print(" Input the gradient ");

        BufferedReader keyboard =new BufferedReader(new InputStreamReader(System.in));

        float gradient = (float) IOUtil.skipToDouble(new Scanner(keyboard));
        float[][] yCalc = StatsUtil.yCalc(xData, gradient);
        float[][] residuals = StatsUtil.residuals(yData, yCalc);

        residualFile(xData, residuals, outFile);
        outFile.close();
        }
    }
    private static float[][] data(float[][] data, Scanner scan){

        for (int i=1;i<data.length;i++){
            for (int j=0;j<data[i].length;j++){

             data[i][j] = (float) IOUtil.skipToDouble(scan);
            }
        }
        System.out.println();
        return data;

    }
    public static void residualFile(float[][] x, float[][] y, PrintWriter outFile)   {

        for (int i=1;i<x.length;i++){

            for (int j=0;j<x[i].length;j++){

                outFile.printf("%2.2f   %2.2f \n", x[i][j], y[i][j]);


            }
        }
        System.out.println();
    }
    public static void completeDataFile(float[][] x, float[][] y, float[][] errorY, float[][] errorX, PrintWriter outFile)   {

        for (int i=1;i<x.length;i++){

            for (int j=0;j<x[i].length;j++){

                outFile.printf("%2.2f   %2.2f \n", x[i][j], y[i][j]);


            }
        }
        System.out.println();
    }
}