UCI-HAR-Dataset

This is a README file explaining the script of "run_analysis.R". Mainly, the script does the following:

• 1. Merges the training and the test sets to create one data set.
• 2. Extracts only the measurements on the mean and standard deviation for each measurement.
• 3. Uses descriptive activity names to name the activities in the data set
• 4. Appropriately labels the data set with descriptive variable names.
• 5. From the data set in step 4, creates a second, independent tidy data set with the average of each variable for each activity and each subject.

In order to explain the script clearly, we devide it into 8 parts as below.

Part 1

Loading the features file.

Part 2

Extracts only the measurements on the mean and standard deviation.

Part 3

Loading the activity_labels.txt

Part 4

Loading the Training data sets.

Part 5

Loading the Test data sets.

Part 6

Merges the training and the test sets to create one data set.

Part 7

Uses descriptive activity names to name the activities in the data set.

Part 8

Write an independent tidy data set with the average of each variable for each activity and each subject.