coursera coursework for cleaning and getting data
(find all project-related materials in the UCI HAR Dataset directory, however, copies of the important files have been put into this main directory to fulfill the submission requirement)
- Unzip the source (https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip) into a folder on your local drive,say C:\Users\yourname\Documents\R
- Put run_analysis.R into C:\Users\yourname\Documents\R\UCI HAR Dataset\
- In RStudio: setwd("C:\Users\yourname\Documents\R\UCI HAR Dataset\"), followed by: source("run_analysis.R")
- Use data <- read.table("data_set_with_the_averages.txt") to read the data. It is 180x68 because there are 30 subjects and 6 activities, thus "for each activity and each subject" means 30 * 6 = 180 rows. Note that the provided R script has no assumptions on numbers of records, only on locations of files.