Averages/Mean angle: Difference between revisions

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@@ Line 785: / Line 785: @@
 {{trans|NetRexx}}
 {{works with|Java|7+}}
-<lang java5>import java.util.ArrayList;
+<lang java5>import java.util.Arrays;
-import java.util.Arrays;
-import java.util.List;
 public class RAvgMeanAngle {
+    public static void main(String[] args) {
-  private static final List<List<Double>> samples;
+        double[][] samples = {
+                {350.0, 10.0},
+                {90.0, 180.0, 270.0, 360.0},
+                {10.0, 20.0, 30.0},
+                {370.0},
+                {180.0}};
+        for (double[] sample : samples) {
-  static {
+            double meanAngle = getMeanAngle(sample);
-    samples = new ArrayList<>();
+            System.out.printf("The mean angle of %s is %s%n", Arrays.toString(sample), meanAngle);
-    samples.add(Arrays.asList(350.0, 10.0));
+        }
-    samples.add(Arrays.asList(90.0, 180.0, 270.0, 360.0));
-    samples.add(Arrays.asList(10.0, 20.0, 30.0));
-    samples.add(Arrays.asList(370.0));
-    samples.add(Arrays.asList(180.0));
-  }
-  public RAvgMeanAngle() {
-    return;
-  }
-  public double getMeanAngle(List<Double> sample) {
-    double x_component = 0.0;
-    double y_component = 0.0;
-    double avg_d, avg_r;
-    for (double angle_d : sample) {
-      double angle_r;
-      angle_r = Math.toRadians(angle_d);
-      x_component += Math.cos(angle_r);
-      y_component += Math.sin(angle_r);
     }
-    x_component /= sample.size();
-    y_component /= sample.size();
-    avg_r = Math.atan2(y_component, x_component);
-    avg_d = Math.toDegrees(avg_r);
+    public static double getMeanAngle(double... anglesDeg) {
-    return avg_d;
+        double x = 0.0;
-  }
+        double y = 0.0;
+        for (double angleD : anglesDeg) {
-  public static void main(String[] args) {
+            double angleR = Math.toRadians(angleD);
+            x += Math.cos(angleR);
-    runSample(args);
+            y += Math.sin(angleR);
-    return;
+        }
+        double avgR = Math.atan2(y / anglesDeg.length, x / anglesDeg.length);
-  }
+        return Math.toDegrees(avgR);
-  public static void runSample(String[] args) {
-    RAvgMeanAngle main = new RAvgMeanAngle();
-    for (List<Double> sample : samples) {
-      double meanAngle = main.getMeanAngle(sample);
-      System.out.printf("The mean angle of %s is:%n%12.6f%n%n", sample, meanAngle);
     }
-    return;
-  }
 }</lang>
 {{out}}
-<pre>The mean angle of [350.0, 10.0] is:
+<pre>The mean angle of [350.0, 10.0] is -1.614809932057922E-15
+The mean angle of [90.0, 180.0, 270.0, 360.0] is -90.0
-   -0.000000
+The mean angle of [10.0, 20.0, 30.0] is 19.999999999999996
-The mean angle of [90.0, 180.0, 270.0, 360.0] is:
+The mean angle of [370.0] is 9.999999999999977
+The mean angle of [180.0] is 180.0</pre>
-  -90.000000
-The mean angle of [10.0, 20.0, 30.0] is:
-.000000
-The mean angle of [370.0] is:
-.000000
-The mean angle of [180.0] is:
-.000000</pre>
 =={{header|JavaScript}}==