I think you need to put quotes around the column header name, something like: NYT["Title"]
example: > my.df <- data.frame(header1=1:3, header2=1:3) > my.df[header2] Error in `[.data.frame`(my.df, header2) : object "header2" not found > my.df["header2"] header2 1 1 2 2 3 3 Hope that helps a little, Tony Breyal On 22 Feb, 04:41, miya <ontiveros_pal...@yahoo.com> wrote: > Hi everyone, > I'm trying to plot some data across time. I have a list of articles, ranks, > date/times, authors, etc. Someone suggested using zoo and someone suggested > using ts. I'm pretty new at this and have been trying a simple if() plot() > statement, but it doesn't seem to work. I keep getting an error that Title > does not exist. Basically its saying that the headers do not exist as > objects. Can anyone please help. > > Below is what I've been trying to do and a sample of the data I am working > with. > > Thanks in advance. > > Time Date Rank Topic Title Author > 0 xxxx 1 A J By PAUL > 0 xxxx 2 B K By PERRI > 0 xxxx 3 C L By WILL > 0 xxxx 4 D M By ANA > 1 xxxx 1 A J By PAUL > 1 xxxx 2 B L By WILL > 1 xxxx 3 C M By ANA > 1 xxxx 4 D K By PERRI > > if(NYT[Title]=="For Catholics, a Door to Absolution Is Reopened") > plot(NYT[Rank]) > > Error in `[.data.frame`(NYT, Title) : object "Title" not found > -- > View this message in > context:http://www.nabble.com/Zoo-or-TS-tp22143632p22143632.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ 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.
