Data Cleaning Exercises

Dataset pack

Sensor temperature readings

Readings from four temperature sensors with a -40 to 85 °C range, including hot days and glitches.

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 Impossible versus unusual readings.

readings 17 rows × 3 columns

Download readings.csv (Pro)

Data dictionary

id
Unique reading ID.
sensor
Sensor location.
temp_c
Temperature in °C 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.