Sorry for the late reply. Here's another approach using quantmod::getSymbols. It implicitly loops over a vector of tickers.
require(quantmod) getSymbols(tickers[,1], from="2011-01-01", to="2011-01-31") # If you want to merge all the close prices into one object: ClosePrices <- do.call(merge, lapply(tickers[,1], function(x) Cl(get(x)))) head(ClosePrices) # BCSI.Close WBSN.Close NTAP.Close FFIV.Close SU.Close # 2011-01-03 30.50 20.36 57.41 134.33 38.82 # 2011-01-04 30.24 19.82 57.38 132.07 38.03 # 2011-01-05 31.36 19.90 57.87 137.29 38.40 # 2011-01-06 32.04 19.79 57.49 138.07 37.23 # 2011-01-07 31.95 19.77 57.20 138.35 37.30 # 2011-01-10 31.55 19.76 58.22 142.69 37.04 Hope that helps, -- Joshua Ulrich | FOSS Trading: www.fosstrading.com On Sun, Mar 13, 2011 at 1:29 PM, algotr8der <algotr8...@gmail.com> wrote: > Thank you all. Your solutions work. I suppose it doesnt matter whether I use > coredata or not (at least for my current purposes). I have created a > user-defined function and have saved it in a ".R" file in my current working > directory. But now I'm not sure how to invoke this function. R complains > that it cannot find the function. > > If I copy and paste the function code into the R console and call it after > that everything works fine. Is there a way to bring that function into > memory by giving a path to its location? I imagine that I will have many > user-defined functions written in their own '.R' files over time. > > Thank you all. > > > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/pass-character-vector-in-instrument-field-of-get-hist-quote-function-tp3350779p3352344.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.