NumPy 配列にスカラーを掛けると、ブロードキャストにより各要素にスカラーが掛けられます。`for` ループを書かずに ...
`order=(p, d, q)` はそれぞれ AR 次数 / 階差数 / MA 次数。`(1, 1, 1)` は 1 階差分を取った系列に AR(1) と MA(1) を当てはめる **ARIMA(1,1,1)** モデルです。 # ─── Q2: 時系列の階差(章 20) ────────────────────── `pct_change()` は前期からの **変化 ...
Save your clicks with a few lines of Python code.
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