What is a Time Series?

A time series is a sequence of ordered observations. It can be:

A time series is characterized by it’s:

• Scale:
• Frequency: How often the data points are recorded per unit time - can be fixed or variable.

In material form, a dataframe of a time series will have columns:

• Timestamp: timezone

Descriptive Analytics

What is important to get right?

Decomposition & auto-correlation

Alignment

• datetimes, timezones, dst
• frequency, resampling (energy, power, rates), events
• cleaning & quality - gaps, missing datetimes etc
• aligning time series

Predictive Analytics

What is important to get right?

Evaluation

Scale (maybe)

useful models

xgboost

sarimax

chronos

typical year forecasting