Fan Wang This is repository for course project of Coursera Getting and cleaning data course.
The goal of this project is to prepare tidy data that can be used for later analysis.
- Set working directory, download and unzip files
- extract only the measurements on the mean and standard deviation.
- Use descriptive activity names
- Read data set into R
- Merge the training and the test sets, and label the data set with descriptive variable names
- Group data set, and calculate the average of each variable for each activity and each subject.
- Create tidy data set
You can find additional information about data sets and variables in the codebook.md file.