Data commit

Task/Averages-Mean-angle/Groovy/averages-mean-angle-1.groovy

@@ -0,0 +1,4 @@
+import static java.lang.Math.*
+def meanAngle = {
+    atan2( it.sum { sin(it * PI / 180) } / it.size(), it.sum { cos(it * PI / 180) } / it.size()) * 180 / PI
+}

Task/Averages-Mean-angle/Groovy/averages-mean-angle-2.groovy

@@ -0,0 +1,8 @@
+def verifyAngle = { angles ->
+    def ma = meanAngle(angles)
+    printf("Mean Angle for $angles: %5.2f%n", ma)
+    round(ma * 100) / 100.0
+}
+assert verifyAngle([350, 10]) == -0
+assert verifyAngle([90, 180, 270, 360]) == -90
+assert verifyAngle([10, 20, 30]) == 20