Thanks David for the reply. I just tried the following with the same result:
>library(tseries)
>tickers <- read.csv("testticker.txt", header=FALSE, sep=",")
>tickers <- tickers[1]
V1
1 XOM
2 COP
3 PBR-A
4 FFIV
5 SU
6 PBR-B
> tickers$V1 <- as.character(tickers$V1)
> tickers$V1
[1] "XOM" "COP" "PBR-A" "FFIV" "SU" "PBR-B"
> symbols <- tickers$V1
> symbols
[1] "XOM" "COP" "PBR-A" "FFIV" "SU" "PBR-B"
> stockdata <- data.frame()
> stockdata <- coredata(get.hist.quote(instruments=symbols,
> start="2011-01-01", end="2011-01-31", quote=c("Close"), provider="yahoo"))
Error in get.hist.quote(instruments = symbols, start = "2011-01-01", end =
"2011-01-31", :
unused argument(s) (instruments = symbols)
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