The data for this project was comprised from a group of files from the following zip file:
https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip.
Specifically, the following files within that zip file were used:
X_test.txt, y_test.txt, subject_test.txt, X_train.txt, y_train.txt, subject_train.txt, features.txt
Within the code, the files are renamed for simplicity, as follows:
testX, testY, testSubject, trainX, trainY, and trainSubject
The files above are combined into a single dataset, denoted by the variable, dat.
Mean and standard deviation calculations are used on entries with the words, "std" or "mean" in them and broken down by the subject and type of activity.
A column is added to the full dataset that names the type of activity for each row. The column is named activityNames and the values include Walking, Walking_Upstairs, Walking_Downstairs, Sitting, Standing, and Laying.
A final tidy data set, "activityDataset.txt" is produced and written into the working directory of the user. This dataset includes all the activity names that were derived earlier in the program.