You have not really made it clear what you are trying to do, and I don't see
the zoo vs ts involvement in your question.
Also, your test data and code snippet you give are not quite consistent.
Thus, my advice is really a long-shot guess.
Assume your data looks like:
Time Date Rank Topic Title Author
1 0 xxxx 1 A J PAUL
2 0 xxxx 2 B K PERRI
3 0 xxxx 3 C L WILL
4 0 xxxx 4 D M ANA
5 1 xxxx 1 A J PAUL
6 1 xxxx 2 B L WILL
7 1 xxxx 3 C M ANA
8 1 xxxx 4 D K PERRI
After copying it to the clipboard, you read it into R (on Windows) using the
command:
df=read.table(file="clipboard",header=TRUE)
You type df and confirm the data is as indicated
You want to plot just the Rank for Title J at times 0 and 1 and any other
time available in the time column. You donot use an "if" statement. Rather
you use conditional arguements:
plot(df$Time[df["Title"]=="J"],df$Rank[df["Title"]=="J"])
If the time variable becomes a ts or zoo object, this syntax should still
work.
Hope this is what you are going after.
Rob Baer
----- Original Message -----
From: "miya" <ontiveros_pal...@yahoo.com>
To: <r-help@r-project.org>
Sent: Sunday, February 22, 2009 10:50 AM
Subject: Re: [R] Zoo or TS
Thank you Tony. I tried that, but still got an error. This is what I got.
if(df["Title"]=="A")
+ plot(df["B"])
Error in `[.data.frame`(df, "Title") : undefined columns selected
I Think there is something wrong with my file because when I call [,1] It
gives me the whole data set, but when I call [,2] it gives me NULL. Any
suggestions on what I need to do?
Thank you.
Tony Breyal wrote:
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
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______________________________________________
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and provide commented, minimal, self-contained, reproducible code.
______________________________________________
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