Hi,
join() works for me.
Please check if the function is masked by loading other packages.
dat1 <- read.table(text="
PT_ID IDX_DT OBS_DATE DAYS_DIFF OBS_VALUE CATEGORY
13 4549 2002-08-21 2002-08-20 -1 183 2
14 4549 2002-08-21 2002-11-14 85 91 1
15 4549 2002-08-21 2003-02-18 181 89 1
16 4549 2002-08-21 2003-05-15 267 109 2
17 4549 2002-08-21 2003-12-16 482 96 1
128 4839 2006-11-28 2006-11-28 0 179 2
", header=TRUE)
dat3<-aggregate(DAYS_DIFF~PT_ID,data=dat1,min)
library(plyr)
join(dat1,dat3,type="inner",by=c("PT_ID","DAYS_DIFF"))
# PT_ID IDX_DT OBS_DATE DAYS_DIFF OBS_VALUE CATEGORY
#1 4549 2002-08-21 2002-08-20 -1 183 2
#2 4839 2006-11-28 2006-11-28 0 179 2
A.K.
----- Original Message -----
From: R. Michael Weylandt <michael.weyla...@gmail.com>
To: Jhope <jeanwaij...@gmail.com>
Cc: r-help@r-project.org
Sent: Monday, October 8, 2012 3:13 AM
Subject: Re: [R] Error - function join()
On Mon, Oct 8, 2012 at 12:22 AM, Jhope <jeanwaij...@gmail.com> wrote:
> Hi R-listers,
>
> In plyr I am using coding I have used before but an error seems to be
> apparent. Has the function "join" been replaced by another word? I tried
> this before and it didn't work and then worked for me. But now it is not
> working again.
>
> Please advise, Jean
>
>> data.to.analyze <- join(responses, envir, by="QuadratEvent")
> Error: could not find function "join"
>
I'm not sure there ever was a commonly used "join" function. Perhaps
you are looking for one of
?merge
?rbind
?cbind
In particular, merge(,,by = "") seems right. But this doesn't have
anything to do with plyr so I might be misunderstanding you.
Michael
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