- run_analysis.R works following step.
- Merges the training and the test sets to create one data set.
- Extracts only the measurements on the mean and standard deviation for each measurement.
- Uses descriptive activity names to name the activities in the data set
- Appropriately labels the data set with descriptive activity names.
- Creates a second, independent tidy data set with the average of each variable for each activity and each subject.
- Requries reshape2 package.
- Only vaiables containing mean() & std() are used(not meanFreq() or something like theses).
Constructed using the following:
> version
platform Windown
arch x86_64
os Windown 7 x64
R version 3.1.0 x64
- Structure
~/current_directory/
------| ~/current_directory/run_analysis.R
------| ~/current_directory/data/
- Download data from https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip. and unzip to the folder ~/current_directory/data/
$ Rscript run_analysis.R
Output: tidy_data.txt