Getting and Cleaning Data Course Project

Below are the contents of this repo:

• First, this repo includes a readme.md, for a list of all files.

• Second, this repo contains the required R script, named as "run_analysis.R"

• Third, the required tidy dataset is uploaded, named as "prj_data_tidy"

• Fourth, here is a code book for explaination of all the variables used for the output data.

For the R script, the follow steps were done to produce the final tidy dataset:

• read in data/subject/activity_label for test datasets, and combined together
• read in data/subject/activity_label for train datasets, and combined together
• combined test and train datasets together
• replace activity labels by descriptive activity names
• only keep the variables containing average or standard deviation for each measurement
• calculate the average for each variable of each subject and each activity
• write the output dataset