Getting_Cleaning_Data_Project/CodeBooks at master · Dirguis/Getting_Cleaning_Data_Project · GitHub

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NOTE: important variables are preceded by a star.

merged_train : merge of the train set
    UCI HAR Dataset/train/X_train.txt
    UCI HAR Dataset/train/subject_train.txt
    UCI HAR Dataset/train/y_train.txt

merge_test : merge of the test set
    UCI HAR Dataset/test/X_test.txt
    UCI HAR Dataset/test/subject_test.txt
    UCI HAR Dataset/test/y_test.txt

* full_data : merge of merged_train and merged_test, corresponding to the merge of the train and test data sets.

features : data frame reading UCI HAR Dataset/features.txt.

* mean_std_data : data frame from full_data, but only with features on only either mean() or std().

activity_labels : data frame reading UCI HAR Dataset/activity_labels.txt

temp : list returned by the function colMeans()

transfertDF : data frame of 1 obs x 68 var constructed from temp with activity_label and individual_ID added.

* meanByIdActivity : data frame of 180 obs x 68 var from the concatenation of multiples transfertDF data frames. The final features are listed below. All are numeric except for activity_label, which are characters.

"individual_ID"
"activity_label"
"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"
"fBodyAccJerk_mean_X"
"fBodyAccJerk_mean_Y"
"fBodyAccJerk_mean_Z"
"fBodyAccJerk_std_X"
"fBodyAccJerk_std_Y"
"fBodyAccJerk_std_Z"
"fBodyGyro_mean_X"
"fBodyGyro_mean_Y"
"fBodyGyro_mean_Z"
"fBodyGyro_std_X"
"fBodyGyro_std_Y"
"fBodyGyro_std_Z"
"fBodyAccMag_mean"
"fBodyAccMag_std"
"fBodyBodyAccJerkMag_mean"
"fBodyBodyAccJerkMag_std"
"fBodyBodyGyroMag_mean"
"fBodyBodyGyroMag_std"
"fBodyBodyGyroJerkMag_mean"
"fBodyBodyGyroJerkMag_std"