README

Purpose

This repository is used for the assignment submission of Getting and Cleaning Data

Files

• run_analysis.R
• result_data.txt
• README.md
• CodeBook.md

run_analysis.R

The R script run_analysis.R does the following steps,

• 1. Load the subject and activity information.
• 2. Load subject and activity data for test and training.
• 3. Load measurement data for each dataset, only keep the required variables/columns for mean and standard deviation.
• 4. Merge data with subject, activity and measurement.
• 5. Merge test and training datasets.
• 6. Change the variable/column name from abbreviation to descriptive names
• 7. Convert 'subject' and 'activity' to factors.
• 8. Create a new data set for the average of each variable for each activity and each subject.
• 9. Save the result in the file 'result_data.txt'

Code Book

Code Book is in file 'CodeBook.md'