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codebook.md

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#Code Book code book for the data set phone_activities.txt

phone_activities.txt contains 180 records. Each record indicates the average value to the measurements for each subject(volunteer) and activity. It contains 68 columns, the definition and of each column is described as below.

All the features are normalized and bounded within [-1,1]

[1] VolunteerNumber

Description: The number of volunteers
Range: 1 : 30
Unit: NA

[2] Activity

Description: The activity of person who carries the smart phone
Range: WALKING, WALKING_UPSTAIRS, WALKING_DOWNSTAIRS, SITTING, STANDING, LAYING
Unit: NA

[3] TimeBodyAccelerationMeanX

Description: Time domain - average value of body acceleration on X axis
Unit: g

[4] TimeBodyAccelerationMeanY

Description: Time domain - average value of body acceleration on Y axis
Unit: g

[5] TimeBodyAccelerationMeanZ

Description: Time domain - average value of body acceleration on Z axis
Unit: g

[6] TimeBodyAccelerationStandardDeviationX

Description: Time domain - standard deviation of body acceleration on X axis
Unit: g

[7] TimeBodyAccelerationStandardDeviationY

Description: Time domain - standard deviation of body acceleration on Y axis
Unit: g

[8] TimeBodyAccelerationStandardDeviationZ

Description: Time domain - standard deviation of body acceleration on Z axis
Unit: g

[9] TimeGravityAccelerationMeanX

Description: Time domain - average of gravity acceleration on X axis
Unit: g

[10] TimeGravityAccelerationMeanY

Description: Time domain - average of gravity acceleration on Y axis
Unit: g

[11] TimeGravityAccelerationMeanZ

Description: Time domain - average of gravity acceleration on Z axis
Unit: g

[12] TimeGravityAccelerationStandardDeviationX

Description: Time domain - standard deviation of gravity acceleration on X axis
Unit: g

[13] TimeGravityAccelerationStandardDeviationY

Description: Time domain - standard deviation of gravity acceleration on Y axis
Unit: g

[14] TimeGravityAccelerationStandardDeviationZ

Description: Time domain - standard deviation of gravity acceleration on Z axis
Unit: g

[15] TimeBodyAccelerationJerkMeanX

Description: Time domain - average of Jerk signal of body acceleration on X axis
Unit: g

[16] TimeBodyAccelerationJerkMeanY

Description: Time domain - average of Jerk signal of body acceleration on Y axis
Unit: g

[17] TimeBodyAccelerationJerkMeanZ

Description: Time domain - average of Jerk signal of body acceleration on Z axis
Unit:

[18] TimeBodyAccelerationJerkStandardDeviationX

Description: Time domain - standard deviation of Jerk signal of body acceleration on X axis
Unit: g

[19] TimeBodyAccelerationJerkStandardDeviationY

Description: Time domain - standard deviation of Jerk signal of body acceleration on Y axis
Unit: g

[20] TimeBodyAccelerationJerkStandardDeviationZ

Description: Time domain - standard deviation of Jerk signal of body acceleration on Z axis
Unit: g

[21] TimeBodyGyroMeanX

Description: Time domain - average of angular velocity vector on X axis
Unit: radians/second

[22] TimeBodyGyroMeanY

Description: Time domain - average of angular velocity vector on Y axis
Unit: radians/second

[23] TimeBodyGyroMeanZ

Description: Time domain - average of angular velocity vector on Z axis
Unit: radians/second

[24] TimeBodyGyroStandardDeviationX

Description: Time domain - standard deviation of angular velocity vector on X axis
Unit: radians/second

[25] TimeBodyGyroStandardDeviationY

Description: Time domain - standard deviation of angular velocity vector on Y axis
Unit: radians/second

[26] TimeBodyGyroStandardDeviationZ

Description: Time domain - standard deviation of angular velocity vector on Z axis
Unit: radians/second

[27] TimeBodyGyroJerkMeanX

Description: Time domain - average of Jerk signals of angular velocity vector on X axis
Unit: radians/second

[28] TimeBodyGyroJerkMeanY

Description: Time domain - average of Jerk signals of angular velocity vector on Y axis
Unit: radians/second

[29] TimeBodyGyroJerkMeanZ

Description: Time domain - average of Jerk signals of angular velocity vector on Z axis
Unit: radians/second

[30] TimeBodyGyroJerkStandardDeviationX

Description: Time domain - standard deviation of Jerk signals of angular velocity vector on X axis
Unit: radians/second

[31] TimeBodyGyroJerkStandardDeviationY

Description: Time domain - standard deviation of Jerk signals of angular velocity vector on Y axis
Unit: radians/second

[32] TimeBodyGyroJerkStandardDeviationZ

Description: Time domain - standard deviation of Jerk signals of angular velocity vector on Z axis
Unit: radians/second

[33] TimeBodyAccelerationMagnitudeMean

Description: Time domain - average of magnitude of body acceleration
Unit: radians/second

[34] TimeBodyAccelerationMagnitudeStandardDeviation

Description: Time domain - standard deviation of magnitude of body acceleration
Unit: g

[35] TimeGravityAccelerationMagnitudeMean

Description: Time domain - average of magnitude of gravity acceleration
Unit: g

[36] TimeGravityAccelerationMagnitudeStandardDeviation

Description: Time domain - standard deviation of magnitude of gravity acceleration
Unit: g

[37] TimeBodyAccelerationJerkMagnitudeMean

Description: Time domain - average of Jerk signal magnitude of body acceleration
Unit: g

[38] TimeBodyAccelerationJerkMagnitudeStandardDeviation

Description: Time domain - standard deviation of Jerk signal magnitude of body acceleration
Unit: g

[39] TimeBodyGyroMagnitudeMean

Description: Time domain - average of magnitude of angular velocity vector
Unit: radians/second

[40] TimeBodyGyroMagnitudeStandardDeviation

Description: Time domain - standard deviation of magnitude of angular velocity vector
Unit: radians/second

[41] TimeBodyGyroJerkMagnitudeMean

Description: Time domain - average of Jerk magnitude of angular velocity vector
Unit: radians/second

[42] TimeBodyGyroJerkMagnitudeStandardDeviation

Description: Time domain - standard deviation of Jerk magnitude of angular velocity vector
Unit: radians/second

[43] FrenquencyBodyAccelerationMeanX

Description: Frequency domain - average of body acceleration on X axis
Unit: g

[44] FrenquencyBodyAccelerationMeanY

Description: Frequency domain - average of body acceleration on Y axis
Unit: g

[45] FrenquencyBodyAccelerationMeanZ

Description: Frequency domain - average of body acceleration on Z axis
Unit: g

[46] FrenquencyBodyAccelerationStandardDeviationX

Description: Frequency domain - standard deviation of body acceleration on X axis
Unit: g

[47] FrenquencyBodyAccelerationStandardDeviationY

Description: Frequency domain - standard deviation of body acceleration on Y axis
Unit: g

[48] FrenquencyBodyAccelerationStandardDeviationZ

Description: Frequency domain - standard deviation of body acceleration on Z axis
Unit: g

[49] FrenquencyBodyAccelerationJerkMeanX

Description: Frequency domain - average of Jerk signals of body acceleration on X axis
Unit: g

[50] FrenquencyBodyAccelerationJerkMeanY

Description: Frequency domain - average of Jerk signals of body acceleration on Y axis
Unit: g

[51] FrenquencyBodyAccelerationJerkMeanZ

Description: Frequency domain - average of Jerk signals of body acceleration on Z axis
Unit: g

[52] FrenquencyBodyAccelerationJerkStandardDeviationX

Description: Frequency domain - standard deviation of Jerk signals of body acceleration on X axis
Unit: g

[53] FrenquencyBodyAccelerationJerkStandardDeviationY

Description: Frequency domain - standard deviation of Jerk signals of body acceleration on Y axis
Unit: g

[54] FrenquencyBodyAccelerationJerkStandardDeviationZ

Description: Frequency domain - standard deviation of Jerk signals of body acceleration on Z axis
Unit: g

[55] FrenquencyBodyGyroMeanX

Description: Frequency domain - average of angular velocity vector on X axis
Unit: radians/second

[56] FrenquencyBodyGyroMeanY

Description: Frequency domain - average of angular velocity vector on Y axis
Unit: radians/second

[57] FrenquencyBodyGyroMeanZ

Description: Frequency domain - average of angular velocity vector on Y axis
Unit: radians/second

[58] FrenquencyBodyGyroStandardDeviationX

Description: Frequency domain - standard deviation of angular velocity vector on X axis
Unit: radians/second

[59] FrenquencyBodyGyroStandardDeviationY

Description: Frequency domain - standard deviation of angular velocity vector on Y axis
Unit: radians/second

[60] FrenquencyBodyGyroStandardDeviationZ

Description: Frequency domain - standard deviation of angular velocity vector on Z axis
Unit: radians/second

[61] FrenquencyBodyAccelerationMagnitudeMean

Description: Frequency domain - average of magnitude of body acceleration
Unit: g

[62] FrenquencyBodyAccelerationMagnitudeStandardDeviation

Description: Frequency domain - standard deviation of magnitude of body acceleration
Unit: g

[63] FrenquencyBodyBodyAccelerationJerkMagnitudeMean

Description: Frequency domain - average of jerk signals magnitude of body acceleration
Unit: g

[64] FrenquencyBodyBodyAccelerationJerkMagnitudeStandardDeviation

Description: Frequency domain - standard deviation of jerk signals magnitude of body acceleration
Unit: g

[65] FrenquencyBodyBodyGyroMagnitudeMean

Description: Frequency domain - average of magnitude of angular velocity vector
Unit: adians/second

[66] FrenquencyBodyBodyGyroMagnitudeStandardDeviation

Description: Frequency domain - standard deviation of magnitude of angular velocity vector
Unit: adians/second

[67] FrenquencyBodyBodyGyroJerkMagnitudeMean

Description: Frequency domain - average of jerk signals magnitude of angular velocity vector
Unit: adians/second

[68] FrenquencyBodyBodyGyroJerkMagnitudeStandardDeviation

Description: Frequency domain - standard deviation of jerk signals magnitude of angular velocity vector
Unit: adians/second