It is giving you exactly what you are asking for.  You asked first which of
dat1$v1 were in dat2$v; you got a TRUE on the second value (2006-05-03):

> dat1$v1 %in% dat2$v1
 [1] FALSE  TRUE  TRUE FALSE  TRUE FALSE  TRUE  TRUE FALSE FALSE FALSE FALSE
FALSE
You then asked for which of dat1$v2 were in dat2$v2 and got a TRUE on the
second entry (3352.5):

> dat1$v2 %in% dat2$v2
 [1] FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
FALSE
The "&" says that the second value in dat1 has values that are in dat2, but
not necessarily at the same location.

On Sun, May 11, 2008 at 9:50 AM, <partofy@inoutbox.com> wrote:

> Dear list:
>
> I can now reproduce with a bit of my real data, the problem I asked for
> your help yestarday:
>
> time1<- as.Date(c("2006-01-03", "2006-05-03", "2006-05-04",
> "2006-05-11", "2006-05-12", "2006-05-16", "2006-05-19", "2006-05-26",
> "2006-09-15", "2006-10-30", "2006-11-08", "2006-11-14", "2006-11-20"))
> volume1<- c(7312.5, 3352.5, 4252.5, 3825.0, 2700.0, 585.0, 810.0,
> 3015.0, 2925.0, 1102.5, 2632.5, 652.5, 1417.5)
> dat1<- data.frame(v1=time1, v2=volume1)
>
> time2<- as.Date(c("2006-05-03", "2006-05-09", "2006-05-04",
> "2006-05-08", "2006-07-14", "2006-07-10", "2006-05-12", "2006-05-17",
> "2006-05-19", "2006-05-26", "2006-05-29", "2006-05-18", "2006-05-22",
> "2006-07-03", "2006-07-05", "2006-07-06", "2006-07-04", "2006-07-24",
> "2006-07-12", "2006-07-18"))
> volume2<- c(4522.5, 7065.0, 3622.5, 7875.0, 3532.5, 3667.5, 6480.0,
> 4612.5, 4005.0, 10350.0, 5310.0, 6345.0, 7177.5, 5107.5, 4837.5, 3352.5,
> 4050.0, 6772.5, 7290.0, 5625.0)
> dat2<- data.frame(v1=time2, v2=volume2)
>
> subset(dat1, v1 %in% dat2$v1 & v2 %in% dat2$v2)
>          v1     v2
> 2 2006-05-03 3352.5
>
> This is not what I expect since this row is not present in dat2 and I
> just want records present in both dataframes.
>
> Help?
>
> J
>
>
>
>
>
> On Sat, 10 May 2008 18:42:51 -0400, "jim holtman" <jholtman@gmail.com>
> said:
> > This seems to work for me:
> >
> > > set.seed(1)
> > > df1 <- data.frame(v1=factor(sample(1:4,20,TRUE)),
> v2=factor(sample(1:3,20,TRUE)), v3=sample(1:3,20,TRUE))
> > > df2 <- data.frame(v1=factor(sample(1:2,20,TRUE)),
> v2=factor(sample(1:2,20,TRUE)), v3=sample(1:2,20,TRUE))
> > > subset(df1, (df1$v1 %in% df2$v1) & (df1$v2 %in% df2$v2) & (df1$v3 %in%
> df2$v3))
> >    v1 v2 v3
> > 2   2  1  2
> > 5   1  1  2
> > 11  1  2  2
> > 14  2  1  1
> > >
> >
> > Exactly what problems are you having?  A sample of your actual data
> > would be useful.
> >
> > On Sat, May 10, 2008 at 6:31 PM,  <partofy@inoutbox.com> wrote:
> > > Dear list:
> > >
> > > I have two dataframes, say dat1 and dat2. Each has several variables
> but
> > > 3 of each are common in both, (say v1, v2 and v3). v1 and v2 are
> > > factores while v3 is numeric. Now, I need a subset to extract the rows
> > > in which v1, v2 and v3 are the same in both dataframes.
> > > I tried:
> > >
> > > subset(dat1, dat1$v1 %in% dat2$v1 & dat1$v2 %in% dat2$v2 & dat1$v3
> %in%
> > > dat2$v3)
> > >
> > > I dont know why, but this is not working as I was expecting. Any
> > > suggestion to improve my code?
> > >
> > > Thanks in advance
> > >
> > > Justin
> > > --
> > >
> > >  partofy@inoutbox.com
> > >
> > > --
> > >
> > > ______________________________________________
> > > 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<http://www.r-project.org/posting-guide.html>
> > > and provide commented, minimal, self-contained, reproducible code.
> > >
> >
> >
> >
> > --
> > Jim Holtman
> > Cincinnati, OH
> > +1 513 646 9390
> >
> > What is the problem you are trying to solve?
> --
>
>  partofy@inoutbox.com
>
> --
> http://www.fastmail.fm - Send your email first class
>
>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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