Skip to content

Latest commit

 

History

History
34 lines (22 loc) · 1.16 KB

CodeBook.md

File metadata and controls

34 lines (22 loc) · 1.16 KB

##Code Book

The source file is here:

https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip

The description of the data is here:

http://archive.ics.uci.edu/ml/datasets/Human+Activity+Recognition+Using+Smartphones

#Transformations:

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

##Attributes

#subject Numerical identifier representing the indvidual subject executing the experiments

#activity description of the activity being undertaken while measurements are taken Can be one of: WALKING, WALKING_UPSTAIRS, WALKING_DOWNSTAIRS, SITTING, STANDING, LAYING

#Average of mean and standard deviation

  • Features are normalized and bounded within [-1,1].
  • The units used for the accelerations (total and body) are 'g's (gravity of earth -> 9.80665 m/seg2).
  • The gyroscope units are rad/seg.