Data commit

Task/Fivenum/D/fivenum.d

@@ -0,0 +1,50 @@
+import std.algorithm;
+import std.exception;
+import std.math;
+import std.stdio;
+
+double median(double[] x) {
+    enforce(x.length >= 0, "Array slice cannot be empty");
+    int m = x.length / 2;
+    if (x.length % 2 == 1) {
+        return x[m];
+    }
+    return (x[m-1] + x[m]) / 2.0;
+}
+
+double[] fivenum(double[] x) {
+    foreach (d; x) {
+        enforce(!d.isNaN, "Unable to deal with arrays containing NaN");
+    }
+
+    double[] result;
+    result.length = 5;
+
+    x.sort;
+    result[0] = x[0];
+    result[2] = median(x);
+    result[4] = x[$-1];
+
+    int m = x.length / 2;
+    int lower = (x.length % 2 == 1) ? m : m - 1;
+    result[1] = median(x[0..lower+1]);
+    result[3] = median(x[lower+1..$]);
+
+    return result;
+}
+
+void main() {
+    double[][] x1 = [
+        [15.0, 6.0, 42.0, 41.0, 7.0, 36.0, 49.0, 40.0, 39.0, 47.0, 43.0],
+        [36.0, 40.0, 7.0, 39.0, 41.0, 15.0],
+        [
+            0.14082834,  0.09748790,  1.73131507,  0.87636009, -1.95059594,  0.73438555,
+           -0.03035726,  1.46675970, -0.74621349, -0.72588772,  0.63905160,  0.61501527,
+           -0.98983780, -1.00447874, -0.62759469,  0.66206163,  1.04312009, -0.10305385,
+            0.75775634,  0.32566578
+        ]
+    ];
+    foreach(x; x1) {
+        writeln(fivenum(x));
+    }
+}