====== Bean Machine ======

The bean machine, also known as the quincunx or Galton box, is a device invented by Sir Francis Galton to demonstrate the law of error and the normal distribution.

===== Animation =====

<ani bean http://animation.r-forge.r-project.org/frames/quincunx/ png 213 500 0.05|Bean Machine (quincunx, Galton box)>
The bean machine, also known as the quincunx or Galton box, is a device invented by Sir Francis Galton to demonstrate the law of error and the normal distribution.
</ani>

===== R Code =====

<code r>
library(animation)
ani.options(ani.height = 500, ani.width = 600, outdir = getwd(), 
    interval = 0.03, nmax = 213, title = "Demonstration of the Galton Box", 
    description = "Balls falling through pins will show you the Normal
    distribution.")
ani.start()
quincunx()
ani.stop()
</code>

===== Video =====

[[http://www.vimeo.com/2013914]]