ritheshkumar95 / gettingdataproject

Getting and Cleaning Data Course Peer Review Project

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