[R] Indexing time series objects
ltorgo at liacc.up.pt
Fri Jun 28 11:18:42 CEST 2002
Hi. I have a question concerning the easiest way to index a time series
object holding some stock quotes. An example:
> ibm <- get.hist.quote("IBM",start="2000-01-01")
My question is:- Suppose I want to know the stock quotes on 2000-01-03. Which
is the easiest way to index the "ibm" time series object to get them?
I got what I wanted using:
But I'm sure there is a much better way to get it!
In summary, my problem is to find the easiest way to convert from my
"natural" way of thinking on the quotes (which is date-based) into the
indexing schema of time series objects, which by looking at the code of
"get.hist.quote" is based on the conversion into the number of days (using
"julian") from an origin.
Thank you for any help.
FEP/LIACC, University of Porto Phone : (+351) 22 607 88 30
Machine Learning Group Fax : (+351) 22 600 36 54
R. Campo Alegre, 823 email : ltorgo at liacc.up.pt
4150 PORTO - PORTUGAL WWW : http://www.liacc.up.pt/~ltorgo
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