H开发者_C百科ow 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" ...
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