[R-SIG-Finance] Accessing "row names" in an object created by quantmod

[Brian G. Peterson]

Ilya has already pointed out the index function.

Slightly more information is that xts objects don't have row names,
they have a time/date based index, and facilities to subset using that
index.  For the most part, you can do this as you would with a
data.frame, by exact index or by row number, but there are also many
other things that you can do as well.

I suggest taking a close look at the xts FAQ:

https://joshuaulrich.github.io/xts/xts_faq.html

Regards,

Brian
 

On Tue, 2017-09-12 at 07:42 -0700, Dennis Fisher wrote:
> R 3.4.1 
> OS X
> 
> Colleagues,
> 
> I am just learning about quantmod and I don’t understand the behavior
> of xts objects.
> 
> For example:
> 	getSymbols("AAPL”)
> Creates an object AAPL
> 
> 	tail(AAPL)
> yields:
>            AAPL.Open AAPL.High AAPL.Low AAPL.Close AAPL.Volume
> AAPL.Adjusted
> 2017-08-
> 31    163.64    164.52   163.48     164.00    26785100        164.00
> 2017-09-
> 01    164.80    164.94   163.63     164.05    16591100        164.05
> 2017-09-
> 05    163.75    164.25   160.56     162.08    29468500        162.08
> 2017-09-
> 06    162.71    162.99   160.52     161.91    21651700        161.91
> 2017-09-
> 07    162.09    162.24   160.36     161.26    21928500        161.26
> 2017-09-
> 08    160.86    161.15   158.53     158.63    28352600        158.63
> 
> I would like to extract a row based on the date column.  The usual
> approaches (e.g., rownames) do not work.  
> 
> So, how do I extract the date column?
> 
> Dennis
> 
> 
> Dennis Fisher MD
> P < (The "P Less Than" Company)
> Phone / Fax: 1-866-PLessThan (1-866-753-7784)
> www.PLessThan.com
> 
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