telendt / getdata_peer_assessment

Getting and Cleaning Data Course Project

Getting and Cleaning Data Course Project

This repository contains the course project for the course Getting and Cleaning Data.

Purpose

The purpose of this project is to demonstrate my ability to collect, work with, and clean a data set. The goal is to prepare tidy data that can be used for later analysis.

The R script

The file run_analysis.R contains the R-code needed to produce two tidy datasets. The first one (step4.txt) contains the means and standard deviations for the different measures from Human Activity Recognition Using Smartphones Dataset. The second dataset (step5.txt) contains the averages (over subject and activity type) of all the features in the first dataset.

The script assumes that the Samsung data is in the working directory.

Usage

If you have GNU Make installed just run:

make

Otherwise download and unzip UCI HAR Dataset and run:

Rscript run_analysis.R

or (in interactive session):

source('run_analysis.R')

Code Book

See CodeBook.md.