codeBook.md

Data Dictionary - UCI HAR Tidy dataset

Activity Name

The name of the activity

SubjectLabel

A number indicating the human subject

Other columns

The rest of the columns can be found in the "features_info.txt" file found in the original dataset. Note that the names have been prefixed with their ordinal position in the original dataset so as to avoid duplicate feature names.

The tidy dataset contains only those features that are a mean or standard deviation of some kind.

The values in the feature columns are the mean of the values in the original dataset, grouped by subjectLabel, Activity, and SubjectLabel + Activity.

Note that when the data is grouped by activity only, then the SubjectLabel value is "AllSubjects".

Note that when the data is grouped by subject only, then the ActibityName value is "AllActivities".