GetData_Project

Files related with Getting and Cleaning Data Course Project:

• run_analysis.R: R script for analysing data from UCI HAR Dataset
• tidydata.txt: summarised dataset obtained as output
• code_book.txt: description of variables in tidydata.txt

Script Description

The script is structured in several steps:

Step 1: reading and merging

• reads all the test and train datasets about measurements, subjects and activities
• joins each train and test dataset in complete datasets
• deletes test and train dataset

Step 2: extracting mean and std measurements

• reads features dataset to name variables in measurements dataset
• extracts measurements on mean and standard deviation

Step 3/4: labeling and merging

• reads labels for activities
• names subjects and activities datasets
• changes id activities to label activities
• joins measurements, subjects and activities datasets

Step 5: summarizing measurements

• builds a melt dataset usind id variables subject and activity
• summarizes the average measurements for each subject and activity
• writes file with tidy data