Getting and Cleaning Data - Course project

Requirements

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

• 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 step 4, creates a second, independent tidy data set with the average of each variable for each activity and each subject.

Working instructions

• Set you working directory where you prefer
• Copy the 'run_analysis.R' script file in the working directory
• launch the script with source("run_analysis.R")
• the raw data file will be downloaded from the repository into the working directory
• the downloaded file will be unzipped in a subfolder named 'UCI HAR Dataset'
• the output file named 'tidyData.txt' will be created in the working directory

Dependencies

• utils
• plyar
• data.tables