How to show which list of all quotes / data series available for example with getSymbols from Yahoo?
I don't know of a way. The TTR package has a function (stockSymbols) to download all the current symbols from the NYSE, AMEX, and NASDAQ. It tries to put them in an acceptable format for Yahoo, but there's no guarantee that the 6,000+ symbols it retrieves have data on Yahoo. I'm not sure what to do for other exchanges...
> library(TTR)
> x <- stockSymbols()
Fetching AMEX symbols...
Fetching NASDAQ symbols...
Fetching NYSE symbols...
> str(x)
'data.frame': 6473 obs. of 8 variables:
$ Symbol : chr "ADK" "ADK-WT" "AFP" "AIM" ...
$ Name : chr "Adcare Health Systems Inc" "Adcare Health Systems Inc" "United Capital Corporation" "Aerosonic Corporation" ...
$ LastSale : num 4.12 2.1 30 2.73 2.7 ...
$ MarketCap: num 3.28e+07 0.00 2.68e+08 1.02e+07 9.29e+07 ...
$ IPOyear : num NA NA 1973 NA NA ...
$ Sector : chr "Health Care" "n/a" "Capital Goods" "Capital Goods" ...
$ Industry : chr "Hospital/Nursing Management" "n/a" "Metal Fabrications" "Industrial Machinery/Components" ...
$ Exchange : chr "AMEX" "AMEX" "AMEX" "AMEX" ...
来源：https://stackoverflow.com/questions/4219308/how-can-i-see-all-available-data-series-from-quantmod-package