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This is the codebook for the summarised data set. The original data is here:

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

The fields in the summarised data are:

1. activity

One of:

  • WALKING
  • WALKING_UPSTAIRS
  • WALKING_DOWNSTAIRS
  • SITTING
  • STANDING
  • LAYING

2. subject

Numeric identifier for subject.

3. Mean feature values grouped by activity and subject

The colunms after the subject are feature values as listed below. Each feature value is the mean value, grouped by activity and subject.

The names are based on those explained in the "features_info.txt", which explains the units, and "features.txt", which lists all of the original variables, files included in the original data set, with the following transformations:

  • All characters are lower case
  • All "-"s are changed to "_"s
  • "()"s have been removed

The variable names are:

  • tbodyacc_mean_x
  • tbodyacc_mean_y
  • tbodyacc_mean_z
  • tbodyacc_std_x
  • tbodyacc_std_y
  • tbodyacc_std_z
  • tgravityacc_mean_x
  • tgravityacc_mean_y
  • tgravityacc_mean_z
  • tgravityacc_std_x
  • tgravityacc_std_y
  • tgravityacc_std_z
  • tbodyaccjerk_mean_x
  • tbodyaccjerk_mean_y
  • tbodyaccjerk_mean_z
  • tbodyaccjerk_std_x
  • tbodyaccjerk_std_y
  • tbodyaccjerk_std_z
  • tbodygyro_mean_x
  • tbodygyro_mean_y
  • tbodygyro_mean_z
  • tbodygyro_std_x
  • tbodygyro_std_y
  • tbodygyro_std_z
  • tbodygyrojerk_mean_x
  • tbodygyrojerk_mean_y
  • tbodygyrojerk_mean_z
  • tbodygyrojerk_std_x
  • tbodygyrojerk_std_y
  • tbodygyrojerk_std_z
  • tbodyaccmag_mean
  • tbodyaccmag_std
  • tgravityaccmag_mean
  • tgravityaccmag_std
  • tbodyaccjerkmag_mean
  • tbodyaccjerkmag_std
  • tbodygyromag_mean
  • tbodygyromag_std
  • tbodygyrojerkmag_mean
  • tbodygyrojerkmag_std
  • fbodyacc_mean_x
  • fbodyacc_mean_y
  • fbodyacc_mean_z
  • fbodyacc_std_x
  • fbodyacc_std_y
  • fbodyacc_std_z
  • fbodyacc_meanfreq_x
  • fbodyacc_meanfreq_y
  • fbodyacc_meanfreq_z
  • fbodyaccjerk_mean_x
  • fbodyaccjerk_mean_y
  • fbodyaccjerk_mean_z
  • fbodyaccjerk_std_x
  • fbodyaccjerk_std_y
  • fbodyaccjerk_std_z
  • fbodyaccjerk_meanfreq_x
  • fbodyaccjerk_meanfreq_y
  • fbodyaccjerk_meanfreq_z
  • fbodygyro_mean_x
  • fbodygyro_mean_y
  • fbodygyro_mean_z
  • fbodygyro_std_x
  • fbodygyro_std_y
  • fbodygyro_std_z
  • fbodygyro_meanfreq_x
  • fbodygyro_meanfreq_y
  • fbodygyro_meanfreq_z
  • fbodyaccmag_mean
  • fbodyaccmag_std
  • fbodyaccmag_meanfreq
  • fbodybodyaccjerkmag_mean
  • fbodybodyaccjerkmag_std
  • bodybodyaccjerkmag_meanfreq
  • fbodybodygyromag_mean
  • fbodybodygyromag_std
  • fbodybodygyromag_meanfreq
  • fbodybodygyrojerkmag_mean
  • fbodybodygyrojerkmag_std
  • fbodybodygyrojerkmag_meanfreq