README: Samsung Galaxy Accelerometer Application Data Analysis
The R script (run_analysis.R) in this repository is a self-contained program to download, manipulate, summarize, and ultimately output a tidy data file as a requirement of the Coursera Getting and Cleaning Data Course Project.
The data is accelerometer information from a test among 30 subjects using the Samsung Galaxy smartphone app which measures physical activity.
The data for this project may be found here...
https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip
...and can also be access by running the R script itself.
The run_analysis.R script is completely documented for easy use. In summary, the R script...
converts the raw data into R data frame objects merges the train and test data into a single files for analysis appends the subject ID to the appropriate row of data changes the data column names to descriptive names changes the activity data to descriptive names produces an aggregated tidy data file of activities.