Menggunakan Prophet

Silakan merujuk ke “prophet Installation” untuk petunjuk instalasi prophet. Juga, silakan merujuk ke Quick Start (prophet | Quick Start) dalam dokumentasi resmi.

Membuat data deret waktu

Buat data deret waktu dummy.

import numpy as np
import pandas as pd
import seaborn as sns
from prophet import Prophet

sns.set(rc={"figure.figsize": (15, 8)})

date = pd.date_range("2020-01-01", periods=365, freq="D")
y = [np.cos(di.weekday()) + di.month % 2 + np.log(i + 1) for i, di in enumerate(date)]

df = pd.DataFrame({"ds": date, "y": y})
df.index = date
sns.lineplot(data=df)

Kereta Api Prophet

m = Prophet(yearly_seasonality=False, daily_seasonality=True)
m.fit(df)

Initial log joint probability = -24.5101
<prophet.forecaster.Prophet at 0x7fe3b5d93d60>
    Iter      log prob        ||dx||      ||grad||       alpha      alpha0  # evals  Notes 
      99       798.528    0.00821602       204.832           1           1      136   
    Iter      log prob        ||dx||      ||grad||       alpha      alpha0  # evals  Notes 
     136       799.486    0.00040141       83.1101    5.02e-06       0.001      225  LS failed, Hessian reset 
     158       799.529    0.00027729       48.4168   3.528e-06       0.001      291  LS failed, Hessian reset 
     199        799.55   3.15651e-05       54.5691           1           1      345   
    Iter      log prob        ||dx||      ||grad||       alpha      alpha0  # evals  Notes 
     204       799.553   3.54297e-05       56.7445    5.36e-07       0.001      397  LS failed, Hessian reset 
     267       799.556   6.19351e-08       44.7029      0.2081           1      490   
Optimization terminated normally: 
  Convergence detected: relative gradient magnitude is below tolerance

Membuat data untuk prakiraan dan menjalankan prakiraan

future = m.make_future_dataframe(periods=90)
forecast = m.predict(future)
fig1 = m.plot(forecast)