She makes the sound the sea makes to calm me down (Dissolve Me, Alt-J)

Searching how to do draw chord diagrams in the Internet with ggplot2 I found a very-easy-to-use package called circlize which does exactly that. A chord diagram shows relationships between things so the input to draw it is simply a matrix with the intensity of these relations. In this experiment I use this package to circlize numbers in this way:

• I take a number with many digits (Rmpfr package is very useful to obtain large numbers), I convert it to text and remove punctuation characters (necessary if number has decimals)
• Function CreateAdjacencyMatrix creates a 10×10 matrix where the element [i,j] contains the number of times that number “i” precedes to number “j” in the previous string (i and j from 0 to 9); this is the input to create diagram.

These diagrams are the result of circlizing four famous constants: Pi (green), Gamma (purple), Catalan (blue) and Logarithm constants (red):

Just two conclusions of my own to end:

• Circlize package is very easy to use and generates very nice diagrams
• Chord diagrams remember me to dreamcatchers
• The more I use RColorBrewer package the more I like it

This is the code to circlize numbers: