
Thanks for your reply,

I couldn't use the method what the example gives. Because Data frame is quite big, and it has so many rows which are repeated. I am not pretty sure about the range of 1000. It turns out I should merge those row which repeated.
Tammy

> From: simon.pickett@bto.org
> To: metal_licaling@live.com; r-help@r-project.org
> Subject: Re: [R] Merging
> Date: Tue, 17 Mar 2009 10:02:51 +0000
> 
> Hi,
> 
> I'm pretty sure you dont mean "merge" since merge() creates a new big data 
> frame from two small ones. It appears that you want to omit some rows.
> 
> As I said before, get used to selecting rows like this
> 
> data.frame<-data.frame[data.frame$conditional.rows>1000,]
> 
> (for example)
> 
> Although I dont have a clue what criteria you are using to select the rows 
> you want...
> 
> Simon.
> 
> 
> 
> 
> 
> >
> > Hi, All.
> >
> >
> > I have a data frame with the part as :
> >
> > .....
> > 142    2006-02-22 16:28:18  useractivity_act       8         0
> > 143    2006-02-22 16:28:26                 4            2         0
> > 144    2006-02-22 16:28:28                 3            3         0
> > 145    2006-02-22 16:28:31                 4            4         1
> > 146    2006-02-22 16:28:35                 3          159        0
> > 147    2006-02-22 16:31:14 useractivity_idle        0         0
> > 1421   2006-02-22 16:28:18  useractivity_act      8         0
> > 1431   2006-02-22 16:28:26                 4            2         0
> > 1441   2006-02-22 16:28:28                 3            3         0
> > 1451   2006-02-22 16:28:31                 4            4         0
> > 1461   2006-02-22 16:28:35                 3          159        25
> > 1471   2006-02-22 16:31:14 useractivity_idle        0         0
> > ....
> >
> > I want to merge the above as
> > 142    2006-02-22 16:28:18  useractivity_act       8         0
> >
> > 143    2006-02-22 16:28:26                 4            2         0
> >
> > 144    2006-02-22 16:28:28                 3            3         0
> >
> > 145    2006-02-22 16:28:31                 4            4         1
> >
> > 146    2006-02-22 16:28:35                 3          159       25
> >
> > 147    2006-02-22 16:31:14 useractivity_idle        0         0
> >
> > How should I do`??
> > Thanks.
> >
> > Tammy
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> > and provide commented, minimal, self-contained, reproducible code.
> > 
> 

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