[R-SIG-Finance] Removing instruments...

G See gsee000 at gmail.com
Tue Sep 18 13:59:52 CEST 2012

Hi Worik,

Either of these will do it
    rm_instruments("AUDCAD", keep.currencies=FALSE)

The reason rm_instruments has a keep.currencies argument is because I
was frustrated that currencies have to be defined before anything
else.  So, I made it a little more work to delete them.  exchange_rate
instruments get treated like currencies because they inherit the
'currency' class (although, personally, I don't think they should).

You could also backup your .instrument environment before
experimenting, then reload it.

You could either back it up by saving it via saveInstruments(), or,
simply convert it to a list and assign it to something.

    tmppdir <- tempdir()
    saveInstruments("test", dir=tmpdir)

    bak <- as.list(FinancialInstrument:::.instrument, all.names=TRUE)

Now, you can revert to a backed up version like this

    reloadInstruments('test', dir=tmpdir)



reloadInstruments(bak) is equivalent to


On Mon, Sep 17, 2012 at 11:09 PM, Worik Stanton <worik.stanton at gmail.com> wrote:
> I have been playing with exchange_rate(..)
> Having called, for example,
> currency("CAD")
> currency("AUD")
> exchange_rate("AUDCAD", currency="CAD", counter_currency="AUD")
> All good so far.
> How do I delete the exchange_rate AUDCAD when I am done with it?
> cheers
> Worik
> --
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