(This article was first published on Data, Evidence, and Policy - Jared Knowles, and kindly contributed to R-bloggers)
Messing around with animations, I created this toy example to make a growing outline of a heart in R. I have put it up as a gist on GitHub and embedded it below. It uses the animation and the ggplot2 packages--both of which make it incredibly simple to make a good looking graphic.
The formula to draw the hearts can be found thanks to Wolfram MathWorld.
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Zuur, Saveliev, Ieno (2012).
