GettingAndCleaningData

This is the final project submission for Coursera Getting and Cleaning Data class for Week 4.

This repository contains the following files:

• run_analysis.R - this is the code file that produces the tidy dataset
• Tidy.csv - This is the tidy data set that is created from running the run_analysis.R script.csv.
• Codebook.md - This file contains details on the structure of Tidy.csv as well as an explanation of the run_analysis.R script file.

How To Run

The steps to run the script are:

• Download the zip file listed in Project Assignment
• Extract the files from the zip to the directory of your choice
• Open R or R Studio and set your working directory to \UCI HAR Dataset path
• Save the run_analysis.R file in the workinng directly
• Source the run_analysis.R file and it will product the Tidy.txt file in the working directory.

Project Assignment

The purpose of this project is to demonstrate your ability to collect, work with, and clean a data set. The goal is to prepare tidy data that can be used for later analysis. You will be graded by your peers on a series of yes/no questions related to the project. You will be required to submit: 1) a tidy data set as described below, 2) a link to a Github repository with your script for performing the analysis, and 3) a code book that describes the variables, the data, and any transformations or work that you performed to clean up the data called CodeBook.md. You should also include a README.md in the repo with your scripts. This repo explains how all of the scripts work and how they are connected.

One of the most exciting areas in all of data science right now is wearable computing - see for example this article . Companies like Fitbit, Nike, and Jawbone Up are racing to develop the most advanced algorithms to attract new users. The data linked to from the course website represent data collected from the accelerometers from the Samsung Galaxy S smartphone. A full description is available at the site where the data was obtained:

http://archive.ics.uci.edu/ml/datasets/Human+Activity+Recognition+Using+Smartphones

Here are the data for the project:

https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip

You should create one R script called run_analysis.R that does the following.

1. Merges the training and the test sets to create one data set.
2. Extracts only the measurements on the mean and standard deviation for each measurement.
3. Uses descriptive activity names to name the activities in the data set
4. Appropriately labels the data set with descriptive variable names.
5. From the data set in step 4, creates a second, independent tidy data set with the average of each variable for each activity and each subject.