Data.java

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;

public class Data {
    String[] roles = {"RB/FB","OL","WR","TE","DB","QB","LB","DL"};

    ArrayList<Player> playerList = new ArrayList<Player>();
    HashMap<String,LinkedList<Double>> means = new HashMap<>();
    HashMap<String,LinkedList<Double>> deviance = new HashMap<>();

    public static void main(String[] main){
        System.out.println("Main");
        Data kilmar = new Data();
        kilmar.cleanData(readFile());
        kilmar.loopLists(kilmar);
    }

    private double calculateProability(double x, double mean, double stdev){
        double exponent = Math.exp( -(Math.pow(x - mean, 2)) / (2 * Math.pow(stdev, 2)));
        return (1 / ( 2*Math.PI ) *stdev ) * exponent;
    }

    private double calculateClassProb(){

    }

    private double predict(){

    }
    private double getPredictions(){

    }

    private void loopLists(Data d){

        for(String s:roles){

            ArrayList<Integer>age=new ArrayList<Integer>();
            ArrayList<Integer>height=new ArrayList<Integer>();
            ArrayList<Integer>weight=new ArrayList<Integer>();

            for(Player p:d.playerList){
                if(p.position.equals(s)){
                    age.add(p.age);
                    weight.add(p.weight);
                    height.add(p.height);
                }
            }
            d.getMean(age, s);
            d.getDeviation(age, 0, s);
            d.getMean(height, s);

            d.getDeviation(height, 1, s);
            d.getMean(weight, s);
            d.getDeviation(weight, 2, s);
        }

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

    private void getDeviation(List<Integer> value, int y, String x){


        double devi;
        double totalSum=0;
        double mean = means.get(x).get(y);

        for(int i =0; i < value.size(); i++) {
            double sqrVal = value.get(i) - mean;
            totalSum = totalSum + Math.pow(sqrVal, 2);
        }

        if(deviance.get(x)==null) {
            deviance.put(x, new LinkedList<Double>());
        }

        devi = Math.sqrt(totalSum / value.size());
        deviance.get(x).add(devi);
    }

    private void getMean(List<Integer> value,String x){

        int total = 0;

        for(int i = 0; i < value.size(); i++) { // get first value
            total += (int) value.get(i);
        }
        double average = total / (value.size()-1);

        if(means.get(x)==null){
            means.put(x,new LinkedList<Double>());
        }
        means.get(x).add(average);
    }

    private static List<String[]> readFile(){
        List<String[]> masterList = new ArrayList<>();
        String filename= "src/DataSet_DEADNFLPLAYERS.txt";
        try {
            BufferedReader br = new BufferedReader(new FileReader(filename));
            String line;
            String[] lineArray;
            while ((line = br.readLine()) != null) {
                lineArray = line.split(",");
                masterList.add(lineArray);
            }
        }
        catch(IOException e){e.printStackTrace();}
        return masterList;
    }

    private void cleanData(List<String[]> masterList){
        int deathYear;
        int birthYear;
        int age; // deathYear - birthYear
        int weight;
        int height;
        String heightHolder;
        String position;
        String birthLocation;

        for(int i=1; i< masterList.size(); i++ ){ //starts at 1 to avoid headers
            String[] currentLine = masterList.get(i);

            deathYear = Integer.parseInt(currentLine[10].replace("\"", "")); //10th element
            birthYear = Integer.parseInt(currentLine[masterList.get(i).length-1].replace("\"", "")); //last element
            age = deathYear - birthYear; // determines the age at death

            if(currentLine[16].length() == 5 && currentLine[17].length() == 5 ) {
                heightHolder = currentLine[16].replace("\"", "");
                weight = Integer.parseInt(currentLine[17].replace("\"", ""));
                position = currentLine[8].replace("\"", "");
                birthLocation = currentLine[masterList.get(i).length - 2].replace("\"", "");
                birthLocation = birthLocation.replace(" ", "");

                height = Character.getNumericValue(heightHolder.charAt(0)) * 30;
                height = height + (Character.getNumericValue(heightHolder.charAt(2)) * 2);
                Player temp = new Player(age, weight, height, position, birthLocation );
                playerList.add(temp);
            }
        }
    }
}

class Player{
    int age;
    int weight;
    int height;

    String position;
    String birthLocation;

    Player(int age, int weight, int height, String position, String birthLocation) {
        this.age =age;
        this.weight =weight;
        this.height =height;
        this.position =position;
        this.birthLocation =birthLocation;
    }
}