Averages/Simple moving average: Difference between revisions
Added Wren
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2 3 3.8
1 2 3
</pre>
=={{header|Wren}}==
{{trans|Go}}
{{libheader|fmt}}
<lang ecmascript>import "/fmt" for Fmt
var sma = Fn.new { |period|
var i = 0
var sum = 0
var storage = []
return Fn.new { |input|
if (storage.count < period) {
sum = sum + input
storage.add(input)
}
sum = sum + input - storage[i]
storage[i] = input
i = (i+1) % period
return sum/storage.count
}
}
var sma3 = sma.call(3)
var sma5 = sma.call(5)
System.print(" x sma3 sma5")
for (x in [1, 2, 3, 4, 5, 5, 4, 3, 2, 1]) {
Fmt.precision = 3
System.print("%(Fmt.f(5, x)) %(Fmt.f(5, sma3.call(x))) %(Fmt.f(5, sma5.call(x)))")
}</lang>
{{out}}
<pre>
x sma3 sma5
1.000 1.000 1.000
2.000 1.500 1.500
3.000 2.000 2.000
4.000 3.000 2.500
5.000 4.000 3.000
5.000 4.667 3.800
4.000 4.667 4.200
3.000 4.000 4.200
2.000 3.000 3.800
1.000 2.000 3.000
</pre>
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