On Feb 23, 2011, at 10:23 AM, Kushan Thakkar wrote:
@Scott:
I can't just use
colnames(IBM) <- c("open","high","low","close","vol")
Well, you can.
I have nearly 100 tickers stored in an vector and I am looping
through them. Its not a good idea to hardcode all of them.
Perhaps putting the ticker objects in a list and then:
lapply( tickerlist, "colnames<-",
c("open","high","low","close","vol") )
(If you provide an example with the level of complexity of the
problem ... you get tested answers rather than guesses.)
--
David.
@David:
Column names is just an example. I have a long script that takes in
an xts object and performs a series of manipulation. I want to to be
able to run the same program on a series of xts objects through a
loop. For that I need to be able to able to dynamically point/refer
to those xts object inside my loop.
On Wed, Feb 23, 2011 at 8:58 AM, David Winsemius <dwinsem...@comcast.net
> wrote:
On Feb 23, 2011, at 8:55 AM, Kushan Thakkar wrote:
I am using getSymbols function from quantmod package to get price
data from
internet.
Currently I have:
my.ticker <- "IBM"
getSymbols(my.ticker,src="google")
This creates an xts object named my.ticker which contains
historical price
data for IBM.
How can I call and manipulating this xts object using my original
string
my.ticker?
I want to do:
colnames(my.ticker) <- c("open","high","low","close","vol")
If you want to change the colnames (an attribute) of the object now
named "IBM" in your global environment, then look a:
?attributes
?attr
However, this does not work as my.ticker refers to the string "IBM"
rather
than the xts object called IBM.
Out of desperation, I have also tried:
colnames(paste(my.ticker)) <- c("open","high","low","close","vol")
colnames(as.xts(my.ticker)) <- c("open","high","low","close","vol")
But why are you do this??? It already has a perfectly servicable set
of names:
> colnames(get(my.ticker))
[1] "IBM.Open" "IBM.High" "IBM.Low" "IBM.Close" "IBM.Volume"
--
David.
Thanks
Kushan
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David Winsemius, MD
West Hartford, CT
David Winsemius, MD
West Hartford, CT
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