Data Resource

Free Data: Data Source - Package Google Finance historical data - quantmod Google Finance balance sheets - quantmod Yahoo Finance historical data - quantmod Yahoo Finance historical data - tseries Yahoo Finance current options chain - quantmod Yahoo Finance historical analyst estimates - fImport Yahoo Finance current key stats - fImport - seems to be broken

OANDA historic exchange rates/metal prices - quantmod FRED historic macroeconomic indicators - quantmod World Bank historic macroeconomic indicators - WDI Google Trends historic search volume data - RGoogleTrends Google Docs - RGoogleDocs Twitter - twitteR Zillow - Zillow New York Times - RNYTimes US Census 2000 - UScensus2000 infochimps - infochimps datamarket - rdatamarket - requires free account - factualR Geocode addresses - RDSTK Map coordinates to political boundaries - RDSTK Weather Underground - Roll your own Google News - Roll your own Earth Sciences netCDF Data - Roll your own Climate Data - Roll your own Public health data - Roll your own FishBase - rfishbase

Paid Data: Bloomberg - RBloomberg LIM - LIM Trades and Quotes from NYSE - RTAQ Interactive Brokers - IBrokers

Useful Tools: RCurl RJSON RJSONIO XML scraper digitizer