Message-ID: <CAF9-5jPOxs-18BxP3ehsUAawfwV--JfMOeHp91aSCGUN9EzoFQ@mail.gmail.com>
Date: 2020-04-21T15:14:29Z
From: Ana Marija
Subject: how to merge two files while preserving the number of rows of one file in merged one?
In-Reply-To: <CAF9-5jOsne2DsqKTDEN0PA+P=B=ZkNfL6AaiG-HG=97yRE7ZyA@mail.gmail.com>
this solved it:
m=merge(a,b,by="ID_1",all.y = T)
On Tue, Apr 21, 2020 at 9:53 AM Ana Marija <sokovic.anamarija at gmail.com> wrote:
>
> Hello,
>
> > head(a)
> ID_1 pheno
> 1 0 B
> 2 fam1000_G1000 0
> 3 fam1001_G1001 0
> 4 fam1003_G1003 1
> 5 fam1005_G1005 0
> 6 fam1009_G1009 0
> > head(b)
> ID_1 ID_2 missing
> 1 0 0 0
> 2 fam1000_G1000 fam1000_G1000 0
> 3 fam1001_G1001 fam1001_G1001 0
> 4 fam1003_G1003 fam1003_G1003 0
> 5 fam1005_G1005 fam1005_G1005 0
> 6 fam1009_G1009 fam1009_G1009 0
> > dim(b)
> [1] 1602 3
> > dim(a)
> [1] 1652 2
> > m=merge(a,b,by="ID_1")
> > dim(m)
> [1] 1499 4
> > head(m)
> ID_1 pheno ID_2 missing
> 1 0 B 0 0
> 2 fam0110_G110 1 fam0110_G110 0
> 3 fam0117_G117 1 fam0117_G117 0
> 4 fam0124_G124 <NA> fam0124_G124 0
>
> I would like my merged file (m) to have the same number of lines like
> (b), that is 1602. Can you please let me know how would I do that?
>
> Thanks
> Ana