Getting-and-Cleaning-Data-Project

Getting and Cleaning Data Project (Sujit Adhye)

Data Download Instructions

1. Download the data archive from https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip
2. The following files must be extracted to your working directory:
   • activity_labels.txt
   • features.txt
   • features_info.txt
   • README.txt
3. The files contained in the 'train' and 'test' folders in the archive must to extracted to 'train' and 'test' folders in your working directory

Description of Data

Please see the codebook for details on the input data for this script. Additional details are available in te README.txt and features_info.txt in the source data

Prerequisites

The following packages must be installed, prior to executing the script:

• plyr
• dplyr

Script

The 'run_analysis.R' script is available in this github repo.

Upon sourcing the script, it performs the following actions:

• Merges the training and the test sets to create one data set.
• Extracts only the measurements on the mean and standard deviation for each measurement.
• Uses descriptive activity names to name the activities in the data set
• Appropriately labels the data set with descriptive variable names.
• From the data set in the above steo, creates a second, independent tidy data set with the average of each variable for each activity and each subject.
• Writes this second data set to the "Project Output.txt" file in your working directory