Data Cleaning Exercises

Dataset pack

Daily values for a forecast

Daily values spanning 2025 and 2026, to be split by time for a forecasting model.

Fictional data · UTF-8 CSV, every value quoted so padding and leading zeros survive; empty fields are missing values · free for personal and classroom practice · practise it in Split train and test by time.

events 17 rows × 3 columns

Download events.csv (Pro)

Data dictionary

id
Unique row ID.
event_date
Date, YYYY-MM-DD.
value
Whole-number value as text.

Values are shown in quotes so leading and trailing spaces are visible. ∅ means the cell is missing. Exercises are also graded on hidden datasets that are never published.