The guys behind the Google Visualisation API don't seem to rest. On 22 February 2012 they released an update of their API. Google added options for a gradient colour axis to bubble chart and a magnifying glass to geo chart, which opens when the user hovers over cluttered markers (excluding IE<=8). Those updates have been incorporated into version 0.2.15 of the googleVis package for R.
Examples of new features
Here are two examples demonstrating the new features.
Bubble chart with gradient colour mode
Example of a bubble chart with a colour gradient axis.Read more »
