Data commit

Task/Averages-Simple-moving-average/Nim/averages-simple-moving-average.nim

@@ -0,0 +1,28 @@
+import deques
+
+proc simplemovingaverage(period: int): auto =
+  assert period > 0
+
+  var
+    summ, n = 0.0
+    values: Deque[float]
+  for i in 1..period:
+    values.addLast(0)
+
+  proc sma(x: float): float =
+    values.addLast(x)
+    summ += x - values.popFirst()
+    n = min(n+1, float(period))
+    result = summ / n
+
+  return sma
+
+var sma = simplemovingaverage(3)
+for i in 1..5: echo sma(float(i))
+for i in countdown(5,1): echo sma(float(i))
+
+echo ""
+
+var sma2 = simplemovingaverage(5)
+for i in 1..5: echo sma2(float(i))
+for i in countdown(5,1): echo sma2(float(i))