Have you gone through any R tutorials? There are innumerable good ones
on the web -- and one that ships with R (An Intro to R). Don't you
think you should make an effort to learn some basics on your own
before posting here?
... or do I misinterpret your question? (And if so, my apologies --
feel free to chastise me appropriately).
Cheers,
Bert
Bert Gunter
"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
-- Clifford Stoll
On Tue, Nov 3, 2015 at 4:26 PM, Robert Sherry <rsher...@comcast.net> wrote:
> I have created what I believe to be a data frame. It is called env1$SPY.
> The r statement head( env1$SPY ) produces the following output:
>
> SPY.Open SPY.High SPY.Low SPY.Close SPY.Volume SPY.Adjusted
> 1995-01-03 45.7031 45.8437 45.6875 45.7812 324300 31.55312
> 1995-01-04 45.9843 46.0000 45.7500 46.0000 351800 31.70392
> 1995-01-05 46.0312 46.1093 45.9531 46.0000 89800 31.70392
> 1995-01-06 46.0937 46.2500 45.9062 46.0468 448400 31.73617
> 1995-01-09 46.0312 46.0937 46.0000 46.0937 36800 31.76850
> 1995-01-10 46.2031 46.3906 46.1406 46.1406 229800 31.80082
>
> The above data from was created by the following commands:
> library( quantmod )
> env1 <- new.env()
> getSymbols("SPY", src = 'yahoo', from = '1995-01-01', env = env1,
> auto.assign = T)
>
> Now, what I want to do is to loo through the data look for when the month
> changes. What is the proper way of writing a for loop in
> R and access the date field?
>
> Bob
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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