I used quantmod to pull in price data from the ticker SPY. The data has
date and closing price. I would like to show the day of the week for each
closing price. Is that possible? Also, I would like to add the back into
the data frame in a new column without changing the structure of the data
set if possible.
SPY
2009-01-02 92.96
2009-01-05 92.85
2009-01-06 93.47
2009-01-07 90.67
2009-01-08 91.04
2009-01-09 89.09
> str(SP500)
An 'xts' object from 2009-01-02 to 2012-07-31 containing:
Data: num [1:902, 1] 93 92.8 93.5 90.7 91 ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : chr "SPY"
Indexed by objects of class: [Date] TZ:
xts Attributes:
List of 4
$ tclass : chr [1:2] "POSIXct" "POSIXt"
$ tzone : chr ""
$ src : chr "yahoo"
$ updated: POSIXct[1:1], format: "2012-07-31 17:59:16"
Thank you,
Douglas
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