[R-SIG-Finance] Using attachSymbols with non-default argument values (Was: the ZigZag function)

[G See]

Gordon,

The way I did it was by storing other arguments/values in the DDB object.

I did this for other getSymbols methods, but not for getSymbols.yahoo.
 Since you asked, I mashed together some code that will do what you
ask.  (see attached).

For this solution, I replaced create.binding, attachSymbols, and
DDB_Yahoo.  I don't know that all of that is necessary.  Anyway, if
you source the attached script, then you can do this.

> attachSymbols2(DB=DDB_Yahoo2(from=Sys.Date()-150))
> head(DIA)
DIA not in memory. fetching....
           DIA.Open DIA.High DIA.Low DIA.Close DIA.Volume DIA.Adjusted
2011-11-28   114.78   115.48  114.31    115.10    6666100       113.96
2011-11-29   115.32   116.18  115.11    115.56    5325400       114.41
2011-11-30   118.41   120.39  118.41    120.19   11581500       119.00
2011-12-01   120.01   120.55  119.66    120.13    5437700       118.94
2011-12-02   121.22   121.40  120.00    120.06    5584400       118.87
2011-12-05   121.77   121.85  120.21    120.95    6285400       119.75


Best,
Garrett

On Thu, Apr 26, 2012 at 3:55 PM, Gordon Erlebacher
<gordon.erlebach at gmail.com> wrote:
> Hi,
>
> I'd like to use attachSymbols() to create an on-demand database. I have two
> questions:
>
> 1) I'd like to restrict the stocks to the past 150 days. I found that
> quantmod:::create.binding  uses the function "getSymbols", which allows a
> range. But how to change the function quantmod:::create.binding to use a
> version of getSymbols() with a different date range? Alternatively, how to
> replace "quantmod:::create.binding" with my own version such that any
> function in quantmod that uses create.binding will use my version. Thanks.
>
> Or there is an easier way to restrict the range of symbols retrieved on
> demand.
>
> Thanks!
>
>    Gordon
>
>        [[alternative HTML version deleted]]
>
> _______________________________________________
> R-SIG-Finance at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-finance
> -- Subscriber-posting only. If you want to post, subscribe first.
> -- Also note that this is not the r-help list where general R questions should go.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: attachSymbolsWithArgs.R
Type: application/octet-stream
Size: 5379 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-sig-finance/attachments/20120426/2745388d/attachment.obj>