The creator used gnuplot with its 'set polar' option. Original Reddit post: http://www.reddit.com/r/Bitcoin/comments/1roerc/i_decided_to_plot_1_year_of_bitcoin

The creator used gnuplot with its 'set polar' option. Original Reddit post: http://www.reddit.com/r/Bitcoin/comments/1roerc/i_decided_to_plot_1_year_of_bitcoin_values_usd/ http://www.reddit.com/r/Bitcoin/comments/1roerc/i_decided_to...