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Averages/Simple moving average: Difference between revisions
Added pony lang version of moving average
(Added pony lang version of moving average) |
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9 3.000000 3.800000
10 2.000000 3.000000</pre>
=={{header|Pony}}==
<lang Pony>
class MovingAverage
let period: USize
let _arr: Array[I32] // circular buffer
var _curr: USize // index of pointer position
var _total: I32 // cache the total so far
new create(period': USize) =>
period = period'
_arr = Array[I32](period) // preallocate space
_curr = 0
_total = 0
fun ref apply(n: I32): F32 =>
_total = _total + n
if _arr.size() < period then
_arr.push(n)
else
try
let prev = _arr.update(_curr, n)?
_total = _total - prev
_curr = (_curr + 1) % period
end
end
_total.f32() / _arr.size().f32()
// ---- TESTING -----
actor Main
new create(env: Env) =>
let foo = MovingAverage(3)
let bar = MovingAverage(5)
let data: Array[I32] = [1; 2; 3; 4; 5; 5; 4; 3; 2; 1]
for v in data.values() do
env.out.print("Foo: " + foo(v).string())
end
for v in data.values() do
env.out.print("Bar: " + bar(v).string())
end
</lang>
=={{header|PowerShell}}==
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