Data update

Task/Cumulative-standard-deviation/FutureBasic/cumulative-standard-deviation.basic

@@ -0,0 +1,19 @@
+double local fn CalcSD( x as double )
+  static double n, sum, sum2
+  n++
+  sum += x
+  sum2 += x * x
+end fn = sqr( sum2 / n - sum * sum / n / n )
+
+void local fn DoIt
+  double testData(7) = {2,4,4,4,5,5,7,9}
+  for int i = 0 to 7
+    double x = testData(i)
+    double a = fn CalcSD( x )
+    printf @"value %.0f SD = %f", x, a
+  next
+end fn
+
+fn DoIt
+
+HandleEvents