pass character vector in instrument field of get.hist.quote function

Hi Joshua,

THank you for showing me how to use getSymbols. I am trying to  
follow the
example you provided. However I am having some difficulty using the  
various
combination of functions you have used. I tried to execute one step  
at a
time as follows -

I have a ticker vector that looks like the following:

tickers

[1] "SPY" "DIA" "IWM" "SMH" "OIH" "XLY" "XLP" "XLE" "XLI" "XLB"  
"XLK" "XLU"
"XLV"
[14] "QQQ"

str(tickers)

chr [1:14] "SPY" "DIA" "IWM" "SMH" "OIH" "XLY" "XLP" "XLE" ...

I wrote a function called myX to use in the lapply call. It has the
following code:

myX <- function(tickers, start, end) {
require(quantmod) # this only needs to be called once.
getSymbols(tickers, from=start, to=end)
}


1) Call lapply by itself

lapply(tickers,myX,start="2001-03-01", end="2011-03-11")

lapply(tickers,myX,start="2001-03-01", end="2011-03-11")

[[1]]
[1] "SPY"

[[2]]
[1] "DIA"

[[14]]
[1] "QQQ"

So this works fine and I can inspect the value of any of the tickers  
i.e.
SPY.

Now I want to extract the Closing prices.

2) I did Cl(SPY) and this outputs the data in the Close column as  
expected.
However, I am not sure how to extract the Closing prices of each of  
the
elements inside the data structure returned by lapply, which I  
believe is a
list structure. I want to merge them into one object as you did but  
I cant
seem to follow.