DataCleaningProject2
Data-cleaning peer-reviewed project that cleans Samsung mobile phone data.
Instructions
Running the analysis code from within this repository requires that the following prerequisites have been met:
- R is installed
- RStudio is installed
- The working directory has been set to this repository's root from within either R or RStudio.
After the previous steps have been completed, execution of the script can be performed by sourcing the 'run_analysis.R' script file.
e.g.
source('./run_analysis.R')
The analysis script cleans, combines and filters the activity data , with the end result being the cleaned activity data as well as a tidy data file being written into the root of this repository.
Code Book
The variable names that have been provided for each observation center around the original feature labels, with cleanup performed by adding '.' and attempting to delineate time-domain versus frequency-domain measurements.
Custom feature labels that were added include the subject's identifier, the identifier of the activity that was measured and a descriptive label for each observed action (e.g. Walking, Standing, Sitting, etc..).
Any other details about the original data set can be found in the README.md in the activity_data folder.
###Variable Names Used
- Activity.Subject.ID
- Activity.ID
- Time.Body.Acceleration.Average-X
- Time.Body.Acceleration.Average-Y
- Time.Body.Acceleration.Average-Z
- Time.Body.Acceleration.StdDeviation-X
- Time.Body.Acceleration.StdDeviation-Y
- Time.Body.Acceleration.StdDeviation-Z
- Time.Gravity.Acceleration.Average-X
- Time.Gravity.Acceleration.Average-Y
- Time.Gravity.Acceleration.Average-Z
- Time.Gravity.Acceleration.StdDeviation-X
- Time.Gravity.Acceleration.StdDeviation-Y
- Time.Gravity.Acceleration.StdDeviation-Z
- Time.Body.Acceleration.Jerk.Average-X
- Time.Body.Acceleration.Jerk.Average-Y
- Time.Body.Acceleration.Jerk.Average-Z
- Time.Body.Acceleration.Jerk.StdDeviation-X
- Time.Body.Acceleration.Jerk.StdDeviation-Y
- Time.Body.Acceleration.Jerk.StdDeviation-Z
- Time.Body.Gyro.Average-X
- Time.Body.Gyro.Average-Y
- Time.Body.Gyro.Average-Z
- Time.Body.Gyro.StdDeviation-X
- Time.Body.Gyro.StdDeviation-Y
- Time.Body.Gyro.StdDeviation-Z
- Time.Body.Gyro.Jerk.Average-X
- Time.Body.Gyro.Jerk.Average-Y
- Time.Body.Gyro.Jerk.Average-Z
- Time.Body.Gyro.Jerk.StdDeviation-X
- Time.Body.Gyro.Jerk.StdDeviation-Y
- Time.Body.Gyro.Jerk.StdDeviation-Z
- Time.Body.Acceleration.Mag.Average
- Time.Body.Acceleration.Mag.StdDeviation
- Time.Gravity.Acceleration.Mag.Average
- Time.Gravity.Acceleration.Mag.StdDeviation
- Time.Body.Acceleration.Jerk.Mag.Average
- Time.Body.Acceleration.Jerk.Mag.StdDeviation
- Time.Body.Gyro.Mag.Average
- Time.Body.Gyro.Mag.StdDeviation
- Time.Body.Gyro.Jerk.Mag.Average
- Time.Body.Gyro.Jerk.Mag.StdDeviation
- Frequency.Body.Acceleration.Average-X
- Frequency.Body.Acceleration.Average-Y
- Frequency.Body.Acceleration.Average-Z
- Frequency.Body.Acceleration.StdDeviation-X
- Frequency.Body.Acceleration.StdDeviation-Y
- Frequency.Body.Acceleration.StdDeviation-Z
- Frequency.Body.Acceleration.AverageFreq-X
- Frequency.Body.Acceleration.AverageFreq-Y
- Frequency.Body.Acceleration.AverageFreq-Z
- Frequency.Body.Acceleration.Jerk.Average-X
- Frequency.Body.Acceleration.Jerk.Average-Y
- Frequency.Body.Acceleration.Jerk.Average-Z
- Frequency.Body.Acceleration.Jerk.StdDeviation-X
- Frequency.Body.Acceleration.Jerk.StdDeviation-Y
- Frequency.Body.Acceleration.Jerk.StdDeviation-Z
- Frequency.Body.Acceleration.Jerk.AverageFreq-X
- Frequency.Body.Acceleration.Jerk.AverageFreq-Y
- Frequency.Body.Acceleration.Jerk.AverageFreq-Z
- Frequency.Body.Gyro.Average-X
- Frequency.Body.Gyro.Average-Y
- Frequency.Body.Gyro.Average-Z
- Frequency.Body.Gyro.StdDeviation-X
- Frequency.Body.Gyro.StdDeviation-Y
- Frequency.Body.Gyro.StdDeviation-Z
- Frequency.Body.Gyro.AverageFreq-X
- Frequency.Body.Gyro.AverageFreq-Y
- Frequency.Body.Gyro.AverageFreq-Z
- Frequency.Body.Acceleration.Mag.Average
- Frequency.Body.Acceleration.Mag.StdDeviation
- Frequency.Body.Acceleration.Mag.AverageFreq
- Frequency.Body.Body.Acceleration.Jerk.Mag.Average
- Frequency.Body.Body.Acceleration.Jerk.Mag.StdDeviation
- Frequency.Body.Body.Acceleration.Jerk.Mag.AverageFreq
- Frequency.Body.Body.Gyro.Mag.Average
- Frequency.Body.Body.Gyro.Mag.StdDeviation
- Frequency.Body.Body.Gyro.Mag.AverageFreq
- Frequency.Body.Body.Gyro.Jerk.Mag.Average
- Frequency.Body.Body.Gyro.Jerk.Mag.StdDeviation
- Frequency.Body.Body.Gyro.Jerk.Mag.AverageFreq
- Activity.Label