[R] Zoo or TS

Tony Breyal tony.breyal at googlemail.com
Sun Feb 22 10:42:55 CET 2009


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... at 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
> --
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>
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