preserving dates in output of tseries

Thanks everyone. I found that casting data.frame
write.table(data.frame(tab), file=filename, quote=F)

does the trick.
Alec
Try?

write.zoo function. works out of the box.?

write.zoo(head(tab))
## "Index" "AdjClose"
## 2008-12-02 0.0377656920201943
## 2008-12-03 0.0237206482126213
## 2008-12-04 -0.0234569003540432
## 2008-12-05 0.0303880024180421
## 2008-12-08 0.0343235654549394
## 2008-12-09 -0.0165746208209656

On Fri, May 2, 2014 at 12:34 AM, aschmid1 <aschmid1 at stevens.edu>
wrote:

I've been stuck for a while with seemingly simple task. I calculate
returns using data from yahoo:
etf = "SPY"
startDate = "2008-12-01"
endDate = "2014-04-04"
prc <- get.hist.quote(instrument = etf, startDate, endDate, quote =
"AdjClose", provider = "yahoo" )
tt<-as.zoo(prc)
dates<-index(tt)
r<-diff(log(tt))
tab<-r

head(tab)
? ? ? ? ? ? ? AdjClose
2008-12-02 ?0.03776569
2008-12-03 ?0.02372065
2008-12-04 -0.02345690
2008-12-05 ?0.03038800
2008-12-08 ?0.03432357
2008-12-09 -0.01657462

But when I save results to a file, dates are replaced:

write.table(tab, file=filename, quote=F)

Here is the contents of the output file:
AdjClose
1 0.0377656920201943
2 0.0237206482126213
3 -0.0234569003540432
4 0.0303880024180421
5 0.0343235654549394
6 -0.0165746208209656

What can be done about this?
Thanks! Alec

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preserving dates in output of tseries

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