Re: which.max2()

by Dimitris Rizopoulos :: Rate this Message:

try this:

v <- rnorm(10)
v
order(v, decreasing = TRUE)[1:2]

I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
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: "Esmail Bonakdarian" <esmail.js@...>
To: <r-help@...>
Sent: Friday, May 09, 2008 3:07 PM
Subject: [R] which.max2()

> Hello,
>
> which.max() only returns one index value, the one for the
> maximum value. If I want the two index values for the two
> largest values, is this a decent solution, or is there a
> nicer/better R'ish way?
>
> max2 <-function(v)
> {
> m=which.max(v)
> v[m] = -v[m]
> m2=which.max(v)
> result=c(m, m2)
> result
> }
>
> Seems to work ok.
>
> Thanks,
> Esmail
>
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> PLEASE do read the posting guide
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>

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