Copy the R program file run_analysis.R to the same directory as file features file
##File read in process
- features
- activity_labels
- train/subject_train
- train/X_train
- train/y_train
- test/subject_train
- test/X_train
- test/y_train
read all file
assign variable name
merge test observes with activity label and subject number
merge train observes with activity label and subject number
merge test and train data
calculate mean by activity and subject and save to file