wjhopper / stats_demos Goto Github PK

some html animatied demos for stats classes, using R and Rmarkdown See them in action at

• The effect of alpha level on power
• The effect of sample size of power
• The effect of sample standard deviation on power
• The effect of effect size on power
• The effect outliers have on regression lines
• A simulated sampling distribution demonstrating the central limit theorem

• System requirements:
  • R
  • pandoc (>= 1.12.3)
• R package requirements
  • animation
  • knitr
  • rmarkdown
  • pander
  • ggplot2
  • grid
  • gridExtra

1. Start an R session with an interactive command line
2. Set the working directory to the directory with build_demos.R in it (the top level dir)
3. source("build_demos.R")
4. build_demos()
5. by default output will be in html_output directory
6. Open html_output/demos.html, follow links to the demos, and be amazed

To only build some demos (they can take a while, ggplot-ing is slow), give build_demos() a character vector specifying which to build. See comments inside build_demos() for more info.