[R] how to get information of many stocks by using loop cycling in R

[William Dunlap]

Make 'S' either an environment or a list.  E.g.,
   SymList <- lapply(c("TIBX","X","IBM"), getSymbols,
auto.assign=FALSE) # lapply returns a list
or
   SymEnv <- new.env() # or SymList <- list()
   for(sym in c("TIBX", "X", "IBM")) SymEnv[[sym]] <- getSymbols(sym,
auto.assign=FALSE)
Use SymList[["TIBX"]] or SymEnv[["TIBX"]] to extract the information for TIBX.

Bill Dunlap
TIBCO Software
wdunlap tibco.com


On Mon, Jun 9, 2014 at 1:12 AM, 黄齐 <m15972031039 at 163.com> wrote:
> Dear R-core :
>
> I am a user of R language from China. I have some problems when I use
> function “getSymbols” which belongs to package “quantmod”,and I hope I
> can get some help from you.
>
> I can get some information of one stock just by entering
> “s1<-getSymbols("600016.ss",from = "2011-05-01",to =
> "2014-05-01",auto.assign=FALSE)”in the R workspace, but if I want to get
> some information of 100 stocks, it is inconvenient for me to enter similar
> order hundred times. So I want to use loop cycling.
>
>
>
> stock<-c("600016.ss","600059.ss","600060.ss","600069.ss")
>
> for(i in seq(stock))
>
> {
>
> S[i]<-getSymbols(stock[i],from="2011-05-01",to="2014-05-01",auto.assign=FALS
> E)
>
> }
>
>
>
> But I do not know how to define S because the class of S[i] are “xts” and
> “zoo”.
>
> Could you give some help, thank you very much.
>
>
> One of users of R in China
>
>
>
>
>
>
>
>
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>
>
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