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gettingdataproject

Getting and Cleaning Data Course Peer Review Project

Variables chosen for the project are those having the mean and standard deviation measurements in the 3 co-ordiante axis(if present) for each of the measurements listed below:

  • tBodyAcc-XYZ
  • tGravityAcc-XYZ
  • tBodyAccJerk-XYZ
  • tBodyGyro-XYZ
  • tBodyGyroJerk-XYZ
  • tBodyAccMag
  • tGravityAccMag
  • tBodyAccJerkMag
  • tBodyGyroMag
  • tBodyGyroJerkMag
  • fBodyAcc-XYZ
  • fBodyAccJerk-XYZ
  • fBodyGyro-XYZ
  • fBodyAccMag
  • fBodyAccJerkMag
  • fBodyGyroMag
  • fBodyGyroJerkMag

##Working Of The Script

  • run_analysis.R sources a function runanaylsis
  • The function sets working directory to train and test and reads the x train, y train, x test and y test data
  • Then these, data are merged and the required features are extracted
  • Activity and subject data are also read
  • Activity names are edited for easier reading
  • Variable names are changed using gsub functions to suit naming functions
  • The data is melted and casted with activity and subject as ID variables and the mean of the measure variables is taken
  • Codebook.md describes the variable names

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