#Project Readme
##The source does the following
1.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\
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Put run_analysis.R to C:\Users\yourname\Documents\R\UCI HAR Dataset\ in RStudio: setwd("C:\Users\yourname\Documents\R\UCI HAR Dataset\") and then: source("run_analysis.R")
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The latter will run the R script, it will read the dataset and write these files:
merged_clean_data.txt -- 8.35 Mb, a 10299x68 data frame
tidy_data.txt -- 0.225 Mb, a 180x68 data frame
- The script normally runs for ~30 seconds, but the exact number depends on your system.
Use data <- read.table("tidy_data.txt") to read the latter. 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.