Check for the files and the package "data.table"
Loading and merging the training and testing datasets. Finally, renaming the variables' names to the values of the features' values.
Added the subjects and the activities. Step 1 finished
Extracting the indexes for "mean" and "std"
Extracting the indexes from "mean" and "std" and finally putting into the "tratestdt." Step 2 finished.
-Added vector "subactindexes" to obtain the indexes of the columns with names "subjects" a
and "activities" and added such indexes to the columns to extract from "tratestdt"
-Added function "GetActivityName" to obtain the name of the activity according to its number
-Reemplazed the activities numbers with theirs names/labels
Changed the columns names