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→Data Cleaning
==== Data Cleaning ====
==== Data Cleaning ====
Check if the device or app produces correct data soon after first use. Correct, remove or impute outliers (very extreme values) produced by errors but not real events. In the rare case that the data is raw sensor like [[Accelerometry]], aggregate it into something more manageable. Consumer wearables make "steps per 10 minutes" for which open source resource is likely available. Finally, compare against other data to remove errors like exercising in the middle of sleep.
Check if the device or app produces correct data soon after first use. Correct, remove or impute outliers (very extreme values) produced by errors but not real events. In the rare case that the data is raw sensor like [[Accelerometry]], aggregate it into something more manageable. Consumer wearables make "steps per 10 minutes" for which open source script is likely available. Finally, compare against other data to remove errors like exercising in the middle of sleep.
== References ==
== References ==