this reposoitory contains the following items
readme.mdcodebook.md: describes the variables, the data, and any transformations or work performed to clean up the datarun_analysis.R: the R script to read, merge and clean up the datatidy_data.txt: the final tidy dataset.
download the data from the following address: https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip
unzip the contents, and change your working directory to the following folder within the data package:
UCI HAR Dataset
The R script does the following steps:
- loading the required libraries
- reading in the data
- merging the training and test sets
- extracting mean and std from merged data
- adding descriptive activity names
- adding descriptive variable names
- removing unnecessary objects from memory
- creating an independent tidy dataset with mean of each variable calculated
- writing the tidy data to a file called
tidy_data.txt