RosettaCodeData/Task/Averages-Simple-moving-average/Icon/averages-simple-moving-aver...

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import Utils
procedure main(A)
sma1 := closure(SMA,[],3)
sma2 := closure(SMA,[],4)
every every n := !A do write(left(sma1(n),20), sma2(n))
end
procedure SMA(stream,P,n)
put(stream, n)
if *stream > P then pop(stream)
every (avg := 0.0) +:= !stream
return avg / *stream
end