[R] Conversion of column matrix into a vector without duplicates

[Dimitris Rizopoulos]

you need: unique(A[, 2])


Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "Shubha Vishwanath Karanth" <shubhak at ambaresearch.com>
To: <r-help at stat.math.ethz.ch>
Sent: Wednesday, January 24, 2007 2:12 PM
Subject: [R] Conversion of column matrix into a vector without 
duplicates


> Hi R,
>
>
>
> I have a matrix A,
>
>
>
> A=
>
>      [,1] [,2]
>
> [1,]  a     u
>
> [2,]  b     v
>
> [3,]  c     x
>
> [4,]  d     x
>
> [5,]  e     x
>
>
>
> I want to put the 2nd column of this matrix in a vector without
> duplicates. i.e., my vector v should be (u, v, x), whose length is 
> 3.
>
>
>
> Can anybody help me on this?
>
>
>
> Thanks in advance
>
> Shubha.
>
>
> [[alternative HTML version deleted]]
>
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> 


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