The OP's confusion might also stem from the fact that ?merge
doesn't actually lead to ?merge.xts which would have been much more helpful here. I think it's a suboptimal consequence of method dispatch that there are no pointers to documented methods...I'll try to work up a small patch to `?` and put it on Rd to see if it gets any traction. Perhaps something like > ?merge # pops up merge's help page, but also cat()s There are documented methods for: merge.xts merge.dendrogram merge.zoo You may wish to check these as well. Or something like that. Feel free to send me thoughts off-list Michael On Tue, Jan 24, 2012 at 10:10 AM, G See <[email protected]> wrote: > Well, it was just a guess since it seemed as if you didn't try it. > Maybe next time you could show us what you tried and why it didn't do > what you wanted. Then, provide a sample dataset and desired outcome. > Those types of questions are much easier for us to answer, which is > why it is suggested here: http://www.r-project.org/posting-guide.html > > Thanks for your understanding, > Garrett > > On Tue, Jan 24, 2012 at 8:55 AM, Michael <[email protected]> wrote: >> Hi G See, >> >> Thanks but I have been watching "?merge" hundreds of times... >> >> It's very terse and there are lots of hidden tricks... >> >> Thanks a lot any way! >> >> And thanks a lot for all the help folks! >> >> On Tue, Jan 24, 2012 at 2:53 AM, G See <[email protected]> wrote: >>> >>> Michael, >>> >>> Maybe you do not realize that when someone writes a word with a >>> question mark in front of it, it means that you should look at the >>> help page for that function. For example, if you type "?merge" in an >>> R terminal (without the quotes) it will open the help page for that >>> function. Another option is to type help(merge) >>> >>> Hope this makes it easier for you to find answers in the future, >>> Garrett >>> >>> On Mon, Jan 23, 2012 at 5:53 PM, Michael <[email protected]> wrote: >>> > Oh I forgot one thing: >>> > >>> > xts_one and xts_two are not neccessarily the same length... >>> > >>> > In effect, I was looking for a time series set-operation "intersect".... >>> > >>> > Thank you! >>> > >>> > On Mon, Jan 23, 2012 at 12:35 PM, Jun Zhu <[email protected]> wrote: >>> > >>> >> Assume you are testing the first column >>> >> >>> >> l_result <- ifelse(l_xts_one[,1] == l_xts_two[,1], l_xts_one[,1],NA) >>> >> >>> >> >>> >> >>> >> >>> >> --- On *Mon, 1/23/12, Brian G. Peterson <[email protected]>* wrote: >>> >> >>> >> >>> >> From: Brian G. Peterson <[email protected]> >>> >> Subject: Re: [R-SIG-Finance] How do I intersecttwo time series? >>> >> To: "Michael" <[email protected]> >>> >> Cc: "r-sig-finance" <[email protected]> >>> >> Date: Monday, January 23, 2012, 8:25 AM >>> >> >>> >> On Mon, 2012-01-23 at 08:06 -0600, Michael wrote: >>> >> > I have two xts objects...and they have coulmns with the same names.ie >>> >> > their column represent the same variables. >>> >> > >>> >> > The only difference is that the values in the rows may be different. >>> >> > At >>> >> > precisely the same timestamps the observations can be exactly the >>> >> > same. >>> >> > >>> >> > How do I find the intersection of these two time series ie the rows >>> >> > where >>> >> > the observations are identical including the time stamps? >>> >> > >>> >> > How do I find intersection where a few specified coulmns are >>> >> > identical >>> >> > including the time stamps? >>> >> > >>> >> > Thanks a lot! >>> >> >>> >> ?merge >>> >> >>> >> ?ifelse >>> >> >>> >> merge is amply covered in the xts documentation, and ifelse is covered >>> >> in many write-ups on vectorized operations in R. >>> >> >>> >> _______________________________________________ >>> >> >>> >> [email protected]<http://mc/[email protected]>mailing >>> >> list >>> >> https://stat.ethz.ch/mailman/listinfo/r-sig-finance >>> >> -- Subscriber-posting only. If you want to post, subscribe first. >>> >> -- Also note that this is not the r-help list where general R questions >>> >> should go. >>> >> >>> >> >>> > >>> > [[alternative HTML version deleted]] >>> > >>> > _______________________________________________ >>> > [email protected] mailing list >>> > https://stat.ethz.ch/mailman/listinfo/r-sig-finance >>> > -- Subscriber-posting only. If you want to post, subscribe first. >>> > -- Also note that this is not the r-help list where general R questions >>> > should go. >> >> > > _______________________________________________ > [email protected] mailing list > https://stat.ethz.ch/mailman/listinfo/r-sig-finance > -- Subscriber-posting only. If you want to post, subscribe first. > -- Also note that this is not the r-help list where general R questions > should go. _______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-sig-finance -- Subscriber-posting only. If you want to post, subscribe first. -- Also note that this is not the r-help list where general R questions should go.
