The variables in the final dataset are as follows. Description of how the measurement were made can be found in Readme.txt included in the original dataset Description of how variable 3 to 81 were derived can be found in features_info.txt in the original dataset All variables 3 to 81 are averages of all observations for each activity performed by each subject
1 subject_id Unique identifier for each of the subject participating in the test Total 30 subjects Value : [1 to 30]
2 activity_names The type of activity being performed by the subject Values : 1 WALKING 2 WALKING_UPSTAIRS 3 WALKING_DOWNSTAIRS 4 SITTING 5 STANDING 6 LAYING
3 tbodyacc-mean()-x Mean of Mean time domain signal for body acceleration in x direction Range [-1 to 1]
4 tbodyacc-mean()-y Mean of Mean time domain signal for body acceleration in y direction Range [-1 to 1]
5 tbodyacc-mean()-z Mean of Mean time domain signal for body acceleration in z direction Range [-1 to 1]
6 tgravityacc-mean()-x Mean of Mean time domain signal for gravity acceleration in x direction Range [-1 to 1]
7 tgravityacc-mean()-y Mean of Mean time domain signal for gravity acceleration in y direction Range [-1 to 1]
8 tgravityacc-mean()-z Mean of Mean time domain signal for gravity acceleration in z direction Range [-1 to 1]
9 tbodyaccjerk-mean()-x Mean of Mean time domain signal for jerk in x direction derived from body acceleration Range [-1 to 1]
10 tbodyaccjerk-mean()-y Mean of Mean time domain signal for jerk in y direction derived from body acceleration Range [-1 to 1]
11 tbodyaccjerk-mean()-z Mean of Mean time domain signal for jerk in z direction derived from body acceleration Range [-1 to 1]
12 tbodygyro-mean()-x Mean of Mean time domain signal for body gyroscope measurement in x direction Range [-1 to 1]
13 tbodygyro-mean()-y Mean of Mean time domain signal for body gyroscope measurement in y direction Range [-1 to 1]
14 tbodygyro-mean()-z Mean of Mean time domain signal for body gyroscope measurement in z direction Range [-1 to 1]
15 tbodygyrojerk-mean()-x Mean of Mean time domain signal for jerk in x direction derived from gyroscope measurement Range [-1 to 1]
16 tbodygyrojerk-mean()-y Mean of Mean time domain signal for jerk in y direction derived from gyroscope measurement Range [-1 to 1]
17 tbodygyrojerk-mean()-z Mean of Mean time domain signal for jerk in z direction derived from gyroscope measurement Range [-1 to 1]
18 tbodyaccmag-mean() Mean of mean time domain body acceleration magnitude Range [-1 to 1]
19 tgravityaccmag-mean() Mean of mean time domain gravity acceleration magnitude Range [-1 to 1]
20 tbodyaccjerkmag-mean() Mean of mean time domain jerk magnitude derived from body acceleration measurement Range [-1 to 1]
21 tbodygyromag-mean() Mean of mean time domain gyroscope magnitude Range [-1 to 1]
22 tbodygyrojerkmag-mean() Mean of mean time domain jerk magnitude derived from gyroscope measurement Range [-1 to 1]
23 fbodyacc-mean()-x Avg of Mean frequency domain signal for body acceleration in x direction Range [-1 to 1]
24 fbodyacc-mean()-y Avg of Mean frequency domain signal for body acceleration in y direction Range [-1 to 1]
25 fbodyacc-mean()-z Avg of Mean frequency domain signal for body acceleration in z direction Range [-1 to 1]
26 fbodyacc-meanfreq()-x Avg of meanfrequency in frequency domain signal for body acceleration in x direction Range [-1 to 1]
27 fbodyacc-meanfreq()-y Avg of meanfrequency in frequency domain signal for body acceleration in y direction Range [-1 to 1]
28 fbodyacc-meanfreq()-z Avg of meanfrequency in frequency domain signal for body acceleration in z direction Range [-1 to 1]
29 fbodyaccjerk-mean()-x Mean of Mean frequency domain signal for jerk in x direction derived from body acceleration Range [-1 to 1]
30 fbodyaccjerk-mean()-y Mean of Mean frequency domain signal for jerk in y direction derived from body acceleration Range [-1 to 1]
31 fbodyaccjerk-mean()-z Mean of Mean frequency domain signal for jerk in z direction derived from body acceleration Range [-1 to 1]
32 fbodyaccjerk-meanfreq()-x Avg of meanfrequency in frequency domain signal for jerk in x direction derived from body acceleration Range [-1 to 1]
33 fbodyaccjerk-meanfreq()-y Avg of meanfrequency in frequency domain signal for jerk in y direction derived from body acceleration Range [-1 to 1]
34 fbodyaccjerk-meanfreq()-z Avg of meanfrequency in frequency domain signal for jerk in z direction derived from body acceleration Range [-1 to 1]
35 fbodygyro-mean()-x Mean of Mean frequency domain signal for body gyroscope measurement in x direction Range [-1 to 1]
36 fbodygyro-mean()-y Mean of Mean frequency domain signal for body gyroscope measurement in y direction Range [-1 to 1]
37 fbodygyro-mean()-z Mean of Mean frequency domain signal for body gyroscope measurement in z direction Range [-1 to 1]
38 fbodygyro-meanfreq()-x Avg of meanfrequency in frequency domain signal for body gyroscope measurement in x direction Range [-1 to 1]
39 fbodygyro-meanfreq()-y Avg of meanfrequency in frequency domain signal for body gyroscope measurement in y direction Range [-1 to 1]
40 fbodygyro-meanfreq()-z Avg of meanfrequency in frequency domain signal for body gyroscope measurement in x direction Range [-1 to 1]
41 fbodyaccmag-mean() Mean of mean frequency domain body acceleration magnitude Range [-1 to 1]
42 fbodyaccmag-meanfreq() Avg of meanFrequency in frequency domain body acceleration magnitude Range [-1 to 1]
43 fbodybodyaccjerkmag-mean() Avg of mean measurement of body body acc jerk mag in frequency domain Range [-1 to 1]
44 fbodybodyaccjerkmag-meanfreq() Avg of meanfreq measurement of body body acc jerk mag in frequency domain Range [-1 to 1]
45 fbodybodygyromag-mean() Avg of mean measurement of body body gyroscope mag in frequency domain Range [-1 to 1]
46 fbodybodygyromag-meanfreq() Avg of meanFreq measurement of body body gyroscope mag in frequency domain Range [-1 to 1]
47 fbodybodygyrojerkmag-mean() Avg of mean measurement of body body gyro jerk mag in frequency domain Range [-1 to 1]
48 fbodybodygyrojerkmag-meanfreq() Avg of meanFreq measurement of body body gyro jerk mag in frequency domain Range [-1 to 1]
49 tbodyacc-std()-x Avg of standard deviation of time domain signal of body acceleration in x direction Range [-1 to 1]
50 tbodyacc-std()-y Avg of standard deviation of time domain signal of body acceleration in y direction Range [-1 to 1]
51 tbodyacc-std()-z Avg of standard deviation of time domain signal of body acceleration in z direction Range [-1 to 1]
52 tgravityacc-std()-x Avg of standard deviation of time domain signal of gravity acceleration in x direction Range [-1 to 1]
53 tgravityacc-std()-y Avg of standard deviation of time domain signal of gravity acceleration in y direction Range [-1 to 1]
54 tgravityacc-std()-z Avg of standard deviation of time domain signal of gravity acceleration in z direction Range [-1 to 1]
55 tbodyaccjerk-std()-x Avg of Standard Deviation of time domain signal for jerk in x direction derived from body acceleration Range [-1 to 1]
56 tbodyaccjerk-std()-y Avg of Standard Deviation of time domain signal for jerk in y direction derived from body acceleration Range [-1 to 1]
57 tbodyaccjerk-std()-z Avg of Standard Deviation of time domain signal for jerk in z direction derived from body acceleration Range [-1 to 1]
58 tbodygyro-std()-x Avg of Standard Deviation of time domain signal for body gyroscope measurement in x direction Range [-1 to 1]
59 tbodygyro-std()-y Avg of Standard Deviation of time domain signal for body gyroscope measurement in y direction Range [-1 to 1]
60 tbodygyro-std()-z Avg of Standard Deviation of time domain signal for body gyroscope measurement in z direction Range [-1 to 1]
61 tbodygyrojerk-std()-x Avg of Standard Deviation of time domain signal for jerk in x direction derived from body gyroscope measurement in x direction Range [-1 to 1]
62 tbodygyrojerk-std()-y Avg of Standard Deviation of time domain signal for jerk in x direction derived from body gyroscope measurement in y direction Range [-1 to 1]
63 tbodygyrojerk-std()-z Avg of Standard Deviation of time domain signal for jerk in x direction derived from body gyroscope measurement in x direction Range [-1 to 1]
64 tbodyaccmag-std() Avg of standard deviation of time domain body acceleration magnitude Range [-1 to 1]
65 tgravityaccmag-std() Avg of standard deviation of time domain gravity acceleration magnitude Range [-1 to 1]
66 tbodyaccjerkmag-std() Avg of standard deviation of time domain jerk magnitude derived from body acceleration Range [-1 to 1]
67 tbodygyromag-std() Avg of standard deviation of time domain body gyroscope magnitude Range [-1 to 1]
68 tbodygyrojerkmag-std() Avg of standard deviation of time domain jerk magnitude derived from body gyroscope measurement Range [-1 to 1]
69 fbodyacc-std()-x Avg of standard deviation of frequency domain signal of body acceleration in x direction Range [-1 to 1]
70 fbodyacc-std()-y Avg of standard deviation of frequency domain signal of body acceleration in y direction Range [-1 to 1]
71 fbodyacc-std()-z Avg of standard deviation of frequency domain signal of body acceleration in z direction Range [-1 to 1]
72 fbodyaccjerk-std()-x Avg of standard deviation of frequency domain signal of jerk in x direction derived body acceleration Range [-1 to 1]
73 fbodyaccjerk-std()-y Avg of standard deviation of frequency domain signal of jerk in y direction derived body acceleration Range [-1 to 1]
74 fbodyaccjerk-std()-z Avg of standard deviation of frequency domain signal of jerk in z direction derived body acceleration Range [-1 to 1]
75 fbodygyro-std()-x Avg of standard deviation of frequency domain signal of gyroscope in x direction Range [-1 to 1]
76 fbodygyro-std()-y Avg of standard deviation of frequency domain signal of gyroscope in y direction Range [-1 to 1]
77 fbodygyro-std()-z Avg of standard deviation of frequency domain signal of gyroscope in z direction Range [-1 to 1]
78 fbodyaccmag-std() Avg of standard deviation of frequency domain signal of body acceleration magnitude Range [-1 to 1]
79 fbodybodyaccjerkmag-std() Avg of standard deviation of frequency domain signal of body body acceleration jerk magnitude Range [-1 to 1]
80 fbodybodygyromag-std() Avg of standard deviation of frequency domain signal of body body gyroscope magnitude Range [-1 to 1]
81 fbodybodygyrojerkmag-std() Avg of standard deviation of frequency domain signal of body body gyroscope jerk magnitude Range [-1 to 1]