nortega/mmmcalc
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Now calculates standard deviation.

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This commit is contained in:
Deathsbreed 2014-04-09 16:55:21 -05:00
parent 1fae1332bd
commit fdc6f484ad
2 changed files with 26 additions and 9 deletions
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33
src/MMMCalc.java
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@ -1,3 +1,4 @@
import java.lang.Math;
import java.util.HashMap; import java.util.HashMap;
import java.util.Map; import java.util.Map;
@ -11,16 +12,22 @@ import java.util.Map;
public class MMMCalc { public class MMMCalc {
private static boolean verbose = false; private static boolean verbose = false;
private static float[] numArray; private static float[] numArray;
private static float mean = 0;
private static float median = 0;
private static float mode = 0;
private static float range = 0;
private static float stdDev = 0;
public static void main(String[] args) { public static void main(String[] args) {
System.out.println("Welcome to MMMCalc v0.1, a simple tool for basic statistics calculations.\n" + System.out.println("Welcome to MMMCalc v0.2, a simple tool for basic statistics calculations.\n" +
"This software is licensed under the GNU GPLv3 license and comes WITHOUT WARRANTY.\n"); "This software is licensed under the GNU GPLv3 license and comes WITHOUT WARRANTY.\n");
if(args.length > 0) { if(args.length > 0) {
if(args[0].equals("-h")) { if(args[0].equals("-h")) {
System.out.println("Usage:\n" + System.out.println("Usage:\n" +
" MMMCalc [options] [variables]\n\n" + " MMMCalc [options] [variables]\n\n" +
"Options:\n" + "Options:\n" +
" -h -- Show this help information.\n"); " -h -- Show this help information.\n" +
" -v | -V -- Be verbose (show the work)\n");
} else if(args[0].equals("-v") || args[0].equals("-V")) { } else if(args[0].equals("-v") || args[0].equals("-V")) {
verbose = true; verbose = true;
numArray = new float[args.length - 1]; numArray = new float[args.length - 1];
@ -34,6 +41,7 @@ public class MMMCalc {
calcMedian(); calcMedian();
calcMode(); calcMode();
calcRange(); calcRange();
calcStdDev();
} else { } else {
numArray = new float[args.length]; numArray = new float[args.length];
@ -46,6 +54,7 @@ public class MMMCalc {
calcMedian(); calcMedian();
calcMode(); calcMode();
calcRange(); calcRange();
calcStdDev();
} }
} else { } else {
System.out.println("You did not mention any variables. Use the -h argument for help."); System.out.println("You did not mention any variables. Use the -h argument for help.");
@ -67,7 +76,6 @@ public class MMMCalc {
} }
private static void calcMean() { private static void calcMean() {
float mean = 0;
float sum = 0; float sum = 0;
for(float i: numArray) { for(float i: numArray) {
@ -80,11 +88,11 @@ public class MMMCalc {
} }
private static void calcMedian() { private static void calcMedian() {
int midVar = 0; int midVar = numArray.length / 2;
midVar = numArray.length / 2; median = numArray[midVar];
System.out.println("Median: " + numArray[midVar]); System.out.println("Median: " + median);
} }
private static void calcMode() { private static void calcMode() {
@ -99,7 +107,6 @@ public class MMMCalc {
} }
} }
float mode = 0;
float modeFreq = 0; float modeFreq = 0;
for(Map.Entry<Float, Float> entry: fx.entrySet()) { for(Map.Entry<Float, Float> entry: fx.entrySet()) {
@ -115,7 +122,6 @@ public class MMMCalc {
private static void calcRange() { private static void calcRange() {
int l = numArray.length -1; int l = numArray.length -1;
float range = 0;
range = numArray[l] - numArray[0]; range = numArray[l] - numArray[0];
System.out.println("Range: " + range); System.out.println("Range: " + range);
@ -124,4 +130,15 @@ public class MMMCalc {
System.out.println(numArray[l] + " - " + numArray[0] + " = " + range + "\n"); System.out.println(numArray[l] + " - " + numArray[0] + " = " + range + "\n");
} }
} }
private static void calcStdDev() {
float difSum = 0;
for(int i = 0; i < numArray.length; i++) {
difSum += numArray[i] - mean;
}
stdDev = difSum / (float)Math.sqrt((double)numArray.length);
System.out.println("Standard Deviation: " + stdDev);
}
} }

2
src/manifest.mf
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@ -1,2 +1,2 @@
Manifest-Version: 0.1 Manifest-Version: 0.2
Main-Class: MMMCalc Main-Class: MMMCalc