Michael: Thanks a lot. It worked. We have to extract the core part of the time-series data.
Then do a xy-plot or linear regression. -Arka On Mon, Oct 24, 2011 at 10:34 AM, Michael Weylandt [via R] < ml-node+s789695n3933306...@n4.nabble.com> wrote: > Comments inline. > > On Oct 24, 2011, at 1:43 AM, ajc <[hidden > email]<http://user/SendEmail.jtp?type=node&node=3933306&i=0>> > wrote: > > > Hi All: > > > > If I download yahoo data by getSymbols() in R, > > from the quantmod package > > > the date column gets > > accompanied along with the downloaded data. There is no column header for > > > the date column to access separately. > > The "date column" isn't a column in the same sense that the OHLC data is: > rather its a time index which is fundamental to the time series object. > > > What is the way to eliminate the date column? > > Seems an ill-advised thing to do to a price series but coredata() or > as.matrix will do it. > > > > > If I want to draw a xy scatter plot with the downloaded price (suppose > AAPL > > vs NASDAQ), I think the date column is creating problem and the plot > > function is not working. > > plot() is working as it should, but I think you are getting tripped up on > R's method-dispatch/S3 system. Without code I can't be sure what you've > tried but I'd guess you did something like > > plot(AAPL, NASDAQ) > > R notes that the first input is an xts so it automatically calls > plot.xts(), which is a plot method for xts objects. plot.xts() throws an > error/warning (can't remember which right now) because there's no sensible > way to plot two time series against each other qua time series. Rather try > this: > > plot( coredata(Cl(AAPL)), coredata(Cl(NASDAQ)) ) > > This strips the time-series-ness from the close series and should produce > the desired scatterplot. Offtopic, isn't this graph usually done in return > space? > > > > > Please advise on this as I am very new to R. > > > > Thanks. > > > > > > -- > > View this message in context: > http://r.789695.n4.nabble.com/Date-column-in-downloaded-date-tp3932125p3932125.html > > Sent from the R help mailing list archive at Nabble.com. > > > > ______________________________________________ > > [hidden email] > > <http://user/SendEmail.jtp?type=node&node=3933306&i=1>mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > [hidden email] <http://user/SendEmail.jtp?type=node&node=3933306&i=2>mailing > list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > > http://r.789695.n4.nabble.com/Date-column-in-downloaded-date-tp3932125p3933306.html > To unsubscribe from Date column in downloaded date, click > here<http://r.789695.n4.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=3932125&code=YXJrb3NhcmtAZ21haWwuY29tfDM5MzIxMjV8OTg4MDgyMDYz>. > > -- View this message in context: http://r.789695.n4.nabble.com/Date-column-in-downloaded-date-tp3932125p3935033.html Sent from the R help mailing list archive at Nabble.com. [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
