read provided data: activities feature names xtestdata (feature Values) ytestdata (resulting activity labelids) xtrainingdata (feature Values) ytrainingdata (resulting activity labelids) subjectstest subjectstraining

Combine trainingdata and testdata with the resulting activity labels and subjects

combine test and traing data to one set

filter the columns to just have the activity labels, and alls mean or standard deviation values

calculate the averages

write the data frame to disk