I’m looking to build a Rails app to do internal reporting (make charts or general data visualizations, create reports, show statistical analyses, etc.) on data my company collects.
What would be helpful in building this? For example, any Rails/Javascript libraries I should be familiar with, or any open source analytics apps or existing dashboard tools I should look at?
Google Visualization API is an easy way to get charts in your application. You could also have a look at Protovis and possibly InfoVis Toolkit.