Averages/Simple moving average: Difference between revisions

=={{header|BQN}}==

<code>SMA</code> takes moving average of a list, given the whole array.

<code>SMA2</code> returns a stateful function which can be run on individual numbers of a stream.

<pre>SMA ← {(+´÷≠)¨(1↓𝕨↑↑𝕩)∾<˘𝕨↕𝕩}

v ← (⊢∾⌽)1+↕5

•Show 5 SMA v

SMA2 ← {

𝕊 size:

nums ← ⟨⟩

sum ← 0

{

nums ∾↩ 𝕩

gb ← ((≠nums)>size)◶0‿{𝕊: a←⊑nums, nums↓˜↩1, a}@

sum +↩ 𝕩 - gb

sum ÷ ≠nums

}

}

fun ← SMA2 5

Fun¨ v</pre>

<pre>⟨ 1 1.5 2 2.5 3 3.8 4.2 4.2 3.8 3 ⟩

⟨ 1 1.5 2 2.5 3 3.8 4.2 4.2 3.8 3 ⟩</pre>

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