1 files changed, 77 insertions, 0 deletions
diff --git a/projects/project1_frequencyBag/RandomDistribution.java b/projects/project1_frequencyBag/RandomDistribution.java
new file mode 100644
index 0000000..4e8bc0f
--- /dev/null
+++ b/projects/project1_frequencyBag/RandomDistribution.java
@@ -0,0 +1,77 @@
+import java.util.Random;
+
+
+public class RandomDistribution
+{
+	public static int normalDistributionInt(int min, int max)
+	{
+		int result;
+		do
+		{
+			result = (int) Math.round(boxMuller() * 100);
+		}
+		while(result < min || result > max);
+		
+		return result;
+	}
+	
+	private static double boxMuller()
+	{
+		Random rand = new Random();
+		double u = rand.nextDouble();
+		double v = rand.nextDouble();
+		return Math.sqrt(-2 * (Math.log(u)/Math.log(Math.E))) * Math.cos(2 * Math.PI * v);
+	}
+	
+	public static int laplaceDistributionInt(int min, int max)
+	{
+		int result;
+		do
+		{
+			result = (int) Math.round(laplaceDistribution() * 100);
+		}
+		while(result < min || result > max);
+		
+		return result;
+	}
+	
+	private static double laplaceDistribution()
+	{
+		Random rand = new Random();
+		double u = rand.nextDouble() - 0.5;
+		
+		return 0 - (Math.signum(u) * Math.log(1 - (2 * Math.abs(u))));
+	}
+
+	public static int uniformDistributionInt(int min, int max)
+	{
+		Random rand = new Random();
+		
+		return rand.nextInt((max - min) + 1) + min;
+	}
+	
+	public static int clockDistribution(int min, int max, int hWidth, int lWidth)
+	{
+		int result;
+		
+		do
+		{
+			result = uniformDistributionInt(min, max);
+			int modResult = result % (hWidth + lWidth);
+			if(modResult < hWidth)
+			{
+				break;
+			}
+			else
+			{
+				if(uniformDistributionInt(0,1) == 1)
+				{
+					break;
+				}
+			}
+		}
+		while(true);
+		
+		return result;
+	}
+}