Calendar charts with googleVis

My little series of posts about the new googleVis charts continues with calendar charts. Google’s calendar charts are still in beta, but they provide already a nice heat map visualisation of calendar year data. The current development version of googleVis supports this new function via gvisCalendar. Here is an example displaying daily stock price data. Loading For the code below to run you will require the developer version (≥ 0.5.0-4) of googleVis from GitHub and R ≥ 3.