title	author	date	output
README	Francisco Cano Marchal	23 de noviembre de 2014	html_document

run_analysis.R script does the following :

1. reads and unzips the following data file, creating a folder with it's content in R's working directory:

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

and reads Training Set X_train.txt and Test Set X_test.txt datasets

2. assigns the corresponding variable names, read from features.txt

3. assigns corresponding activity labels, using the info from y_train.txt, y_test.txt and activity_labels.txt

4. assings corresponding subject to each row, using the info from subject_test.txt and subject_train.txt

5. merges both Training and Test datasets into unique dataframe

6. extracts mean and standar deviation values of each variable

7. extracts MEAN VALUES OF EACH VARIABLE FOR EACH SUBJECT AND ACTIVITY, and creates a file name meansbyactivitysubject.txt containing a table with this information.