See: https://www.coursera.org/course/getdata
Run the script run_analysis.R, and as an output you should find (in the same folder where you ran the script) a file called tidy-data-set-created-in-step-5.txt
- Subject: identify by a number each person that volunteered for the project.
- Activity: are the phisical activities when taking the measure. There are 6 types: walking, walking upstairs, walking downstairs, sitting, standing, and laying
- Variable: type of meassure. There are 561 types. See file features.txt for further info.
- Average: average of each variable for each activity and each subject.