https://github.com/uriklar/omerproject

https://github.com/uriklar/omerproject

Last synced: 13 days ago
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• Host: GitHub
• URL: https://github.com/uriklar/omerproject
• Owner: uriklar
• Created: 2014-08-20T18:17:49.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2014-08-20T20:21:10.000Z (about 10 years ago)
• Last Synced: 2024-10-17T16:05:24.282Z (about 1 month ago)
• Language: R
• Size: 3.81 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
Getting and Cleaning Data Course Project

========================================

This file describes how run_analysis.R script works.

* First, unzip the data from https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip and rename the folder with "data".

* Make sure the folder "data" and the run_analysis.R script are both in the current working directory.

* Second, use source("run_analysis.R") command in RStudio. 

* Third, you will find two output files are generated in the current working directory:

  - merged_data.txt (6.3 Mb): it contains a data frame called cleanedData with 10299*81 dimension.

  - data_with_means.txt (124 Kb): it contains a data frame called result with 180*81 dimension.

* Finally, use data <- read.table("agg.txt") command in RStudio to read the file. Since we are required to get the average of each variable for each activity and each subject, and there are 6 activities in total and 30 subjects in total, we have 180 rows with all combinations for each of the 81 features.