92 lines
1.9 KiB
Java
92 lines
1.9 KiB
Java
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @author Nicolás A. Ortega
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* @copyright (C) Nicolás A. Ortega
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* @license GNU General Public License 3.0 (GPLv3)
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* @year 2014
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*
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*/
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public class MMMCalc {
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private static float[] numArray;
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public static void main(String[] args) {
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System.out.println("Welcome to MMMCalc v0.1, a simple tool for basic statistics calculations.\n" +
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"This software is licensed under the GNU GPLv3 license and comes WITHOUT WARRANTY.\n");
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if(args.length > 0) {
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float sNum = 0;
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numArray = new float[args.length];
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for(int i = 0; i < args.length; i++) {
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numArray[i] = Float.parseFloat(args[i]) - 0f;
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}
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int nL = numArray.length;
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float tmp = 0;
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for(int i = 0; i < nL; i++) {
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for(int j = 0; j >= (i+1); j--) {
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if(numArray[j] < numArray[j-1]) {
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tmp = numArray[j];
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numArray[j] = numArray[j-1];
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numArray[j-1] = tmp;
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}
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}
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}
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calcMean();
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calcMedian();
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calcMode();
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} else {
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System.out.println("You did not mention any variables.");
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}
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}
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private static void calcMean() {
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float mean = 0;
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float sum = 0;
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for(float i: numArray) {
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sum += i;
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}
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mean = sum / (float)numArray.length;
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System.out.println("Mean: " + mean);
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}
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private static void calcMedian() {
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int midVar = 0;
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midVar = numArray.length / 2;
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System.out.println("Median: " + numArray[midVar]);
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}
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private static void calcMode() {
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HashMap<Float, Float> fx = new HashMap<Float, Float>();
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for(float x: numArray) {
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Float f = fx.get(x);
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if(f == null) {
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fx.put(x, (float)1);
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} else {
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fx.put(x, f + 1);
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}
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}
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float mode = 0;
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float modeFreq = 0;
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for(Map.Entry<Float, Float> entry: fx.entrySet()) {
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float freq = entry.getValue();
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if(freq > modeFreq) {
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modeFreq = freq;
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mode = entry.getKey();
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}
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}
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System.out.println("Mode: " + mode + " (frequency: " + modeFreq + ")");
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}
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}
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