codebook.rmd

---
title: "Codebook"
output:
  html_document:
    df_print: paged
---

## Overview
This document decribes the variable information in `tidydata.txt`. User can knit this rmarkdown file in Rstudio, which will automatically produce the the data file into the working directory as well as producing the `codebook.html`.

The r codes are self-contained and platform independent. 

The codebook is generated by `codebook` command in the `memisc` package.

To view: <http://htmlpreview.github.io/?https://github.com/zhouyisu/get-and-cleaning-data_course-project/blob/master/codebook.html>

## Variable naming
Following changes are made to the original variable names:
- prefix t is replaced by time
- Acc is replaced by Accelerometer
- Gyro is replaced by Gyroscope
- prefix f is replaced by frequency
- Mag is replaced by Magnitude
- BodyBody is replaced by Body

## Variable attributes
```{r message=FALSE}
source("run_analysis.R")
library(memisc)
codebook(mush3)
```