run_analysis.R

Script intended to:
1.- Merges the training and the test sets to create one data set.
2.- Extracts only the measurements on the mean and standard deviation for each measurement. 
3.- Uses descriptive activity names to name the activities in the data set
4.- Appropriately labels the data set with descriptive variable names. 
5.- Creates a second, independent tidy data set with the average of each variable for each activity and each subject.