GetDataPeerAssessment

Coursera course "Getting and Cleaning Data" Peer Assessment Repository

The goal is to tidy the data set from the Human Activity Recognition Using Smartphones Dataset[1] following those instructions:

• 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.

See CodeBook.md for full explaination.

The data set can be found at the following URL: http://archive.ics.uci.edu/ml/datasets/Human+Activity+Recognition+Using+Smartphones

Usage

  source('run_analysis.R')

If not present it will download the dataset from UCI in the 'data' subfolder and unzip it.

The script will create a file called 'tidy.txt'.

References:

[1] Davide Anguita, Alessandro Ghio, Luca Oneto, Xavier Parra and Jorge L. Reyes-Ortiz. Human Activity Recognition on Smartphones using a Multiclass Hardware-Friendly Support Vector Machine. International Workshop of Ambient Assisted Living (IWAAL 2012). Vitoria-Gasteiz, Spain. Dec 2012