Final project of "getting and cleaning data"

repository contents

this reposoitory contains the following items

• readme.md
• codebook.md : describes the variables, the data, and any transformations or work performed to clean up the data
• run_analysis.R : the R script to read, merge and clean up the data
• tidy_data.txt : the final tidy dataset.

workflow

download the data from the following address: https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip

unzip the contents, and change your working directory to the following folder within the data package: UCI HAR Dataset

The R script does the following steps:

• loading the required libraries
• reading in the data
• merging the training and test sets
• extracting mean and std from merged data
• adding descriptive activity names
• adding descriptive variable names
• removing unnecessary objects from memory
• creating an independent tidy dataset with mean of each variable calculated
• writing the tidy data to a file called tidy_data.txt