CodeBook.md

Code Book

Introduction

This file contains the information about all the step which were undertaken in order to transform and compile the final dataset.

Data

Original datasets are in separated files of testing and trainign chunks. The script merges all the required data into one data frame. No renaming is requird, since the script assumes the original file names from the downloaded archive are untouched.

Variables

	Variable symbol	Explanation
1	subject	Subject individual ID
2	activity	Activity type WALKING/STANDING/LAYING/etc.
3	FrequencyBodyAccelerationJerkMeanX	Frequency Body Acceleration Jerk mean X
4	FrequencyBodyAccelerationJerkMeanY	Frequency Body Acceleration Jerk mean Y
5	FrequencyBodyAccelerationJerkMeanZ	Frequency Body Acceleration Jerk mean Z
6	FrequencyBodyAccelerationJerkStDevX	Frequency Body Acceleration Jerk standard deviation X
7	FrequencyBodyAccelerationJerkStDevY	Frequency Body Acceleration Jerk standard deviation Y
8	FrequencyBodyAccelerationJerkStDevZ	Frequency Body Acceleration Jerk standard deviation Z
9	FrequencyBodyAccelerationMagnitudeMean	Frequency Body Acceleration Magnitude mean
10	FrequencyBodyAccelerationMagnitudeStDev	Frequency Body Acceleration Magnitude standard deviation
11	FrequencyBodyAccelerationMeanX	Frequency Body Acceleration mean X
12	FrequencyBodyAccelerationMeanY	Frequency Body Acceleration mean Y
13	FrequencyBodyAccelerationMeanZ	Frequency Body Acceleration mean Z
14	FrequencyBodyAccelerationStDevX	Frequency Body Acceleration standard deviation X
15	FrequencyBodyAccelerationStDevY	Frequency Body Acceleration standard deviation Y
16	FrequencyBodyAccelerationStDevZ	Frequency Body Acceleration standard deviation Z
17	FrequencyBodyBodyAccelerationJerkMagnitudeMean	Frequency Body Acceleration Jerk Magnitude mean
18	FrequencyBodyBodyAccelerationJerkMagnitudeStDev	Frequency Body Acceleration Jerk Magnitude standard deviation
19	FrequencyBodyBodyGyroscopeJerkMagnitudeMean	Frequency Body Gyroscope Jerk Magnitude mean
20	FrequencyBodyBodyGyroscopeJerkMagnitudeStDev	Frequency Body Gyroscope Jerk Magnitude standard deviation
21	FrequencyBodyBodyGyroscopeMagnitudeMean	Frequency Body Gyroscope Magnitude mean
22	FrequencyBodyBodyGyroscopeMagnitudeStDev	Frequency Body Gyroscope Magnitude standard deviation
23	FrequencyBodyGyroscopeMeanX	Frequency Body Gyroscope mean X
24	FrequencyBodyGyroscopeMeanY	Frequency Body Gyroscope mean Y
25	FrequencyBodyGyroscopeMeanZ	Frequency Body Gyroscope mean Z
26	FrequencyBodyGyroscopeStDevX	Frequency Body Gyroscope standard deviation X
27	FrequencyBodyGyroscopeStDevY	Frequency Body Gyroscope standard deviation Y
28	FrequencyBodyGyroscopeStDevZ	Frequency Body Gyroscope standard deviation Z
29	TimeBodyAccelerationJerkMagnitudeMean	Time Body Acceleration Jerk Magnitude mean
30	TimeBodyAccelerationJerkMagnitudeStDev	Time Body Acceleration Jerk Magnitude standard deviation
31	TimeBodyAccelerationJerkMeanX	Time Body Acceleration Jerk mean X
32	TimeBodyAccelerationJerkMeanY	Time Body Acceleration Jerk mean Y
33	TimeBodyAccelerationJerkMeanZ	Time Body Acceleration Jerk mean Z
34	TimeBodyAccelerationJerkStDevX	Time Body Acceleration Jerk standard deviation X
35	TimeBodyAccelerationJerkStDevY	Time Body Acceleration Jerk standard deviation Y
36	TimeBodyAccelerationJerkStDevZ	Time Body Acceleration Jerk standard deviation Z
37	TimeBodyAccelerationMagnitudeMean	Time Body Acceleration Magnitude mean
38	TimeBodyAccelerationMagnitudeStDev	Time Body Acceleration Magnitude standard deviation
39	TimeBodyAccelerationMeanX	Time Body Acceleration mean X
40	TimeBodyAccelerationMeanY	Time Body Acceleration mean Y
41	TimeBodyAccelerationMeanZ	Time Body Acceleration mean Z
42	TimeBodyAccelerationStDevX	Time Body Acceleration standard deviation X
43	TimeBodyAccelerationStDevY	Time Body Acceleration standard deviation Y
44	TimeBodyAccelerationStDevZ	Time Body Acceleration standard deviation Z
45	TimeBodyGyroscopeJerkMagnitudeMean	Time Body Gyroscope Jerk Magnitude mean
46	TimeBodyGyroscopeJerkMagnitudeStDev	Time Body Gyroscope Jerk Magnitude standard deviation
47	TimeBodyGyroscopeJerkMeanX	Time Body Gyroscope Jerk mean X
48	TimeBodyGyroscopeJerkMeanY	Time Body Gyroscope Jerk mean Y
49	TimeBodyGyroscopeJerkMeanZ	Time Body Gyroscope Jerk mean Z
50	TimeBodyGyroscopeJerkStDevX	Time Body Gyroscope Jerk standard deviation X
51	TimeBodyGyroscopeJerkStDevY	Time Body Gyroscope Jerk standard deviation Y
52	TimeBodyGyroscopeJerkStDevZ	Time Body Gyroscope Jerk standard deviation Z
53	TimeBodyGyroscopeMagnitudeMean	Time Body Gyroscope Magnitude mean
54	TimeBodyGyroscopeMagnitudeStDev	Time Body Gyroscope Magnitude standard deviation
55	TimeBodyGyroscopeMeanX	Time Body Gyroscope mean X
56	TimeBodyGyroscopeMeanY	Time Body Gyroscope mean Y
57	TimeBodyGyroscopeMeanZ	Time Body Gyroscope mean Z
58	TimeBodyGyroscopeStDevX	Time Body Gyroscope standard deviation X
59	TimeBodyGyroscopeStDevY	Time Body Gyroscope standard deviation Y
60	TimeBodyGyroscopeStDevZ	Time Body Gyroscope standard deviation Z
61	TimeGravityAccelerationMagnitudeMean	Time Gravity Acceleration Magnitude mean
62	TimeGravityAccelerationMagnitudeStDev	Time Gravity Acceleration Magnitude standard deviation
63	TimeGravityAccelerationMeanX	Time Gravity Acceleration mean X
64	TimeGravityAccelerationMeanY	Time Gravity Acceleration mean Y
65	TimeGravityAccelerationMeanZ	Time Gravity Acceleration mean Z
66	TimeGravityAccelerationStDevX	Time Gravity Acceleration standard deviation X
67	TimeGravityAccelerationStDevY	Time Gravity Acceleration standard deviation Y
68	TimeGravityAccelerationStDevZ	Time Gravity Acceleration standard deviation Z