[R] Transform counts into presence/absence

[Rui Barradas]

Hello,

Actually, your output is wrong, you have compared the elements of a 'x', 
not Counts, to 0.

 > Counts <- c(1,0,21,2,0,0,234,2,0,NA)
 > Counts > 0
  [1]  TRUE FALSE  TRUE  TRUE FALSE FALSE  TRUE  TRUE FALSE    NA
 > 1 *(Counts > 0)
  [1]  1  0  1  1  0  0  1  1  0 NA
 > as.integer(Counts != 0)
  [1]  1  0  1  1  0  0  1  1  0 NA

Anyway, I hadn't thought of that. It's good to know how they behave.

Rui Barradas

Em 31-05-2012 23:58, Duncan Mackay escreveu:
> Hi
>
> I was curious on the possibilities -- what if an NA creeps in?
>
> Counts <- c(1,0,21,2,0,0,234,2,0,NA)
> Counts > 0
> 1 *(Counts > 0)
>  [1]  1  0  1  1  0  0  1  1  0 NA
>
> as.integer(x != 0)
> [1] 1 0 1 1 0 0 1 1 0
>
> Regards
>
> Duncan
>
> Duncan Mackay
> Department of Agronomy and Soil Science
> University of New England
> Armidale NSW 2351
> Email: home: mackay at northnet.com.au
>
>
> At 21:27 31/05/2012, you wrote:
>
>
>> -------- Original-Nachricht --------
>> > Datum: Thu, 31 May 2012 11:16:32 +0000
>> > Von: "ONKELINX, Thierry" <Thierry.ONKELINX at inbo.be>
>> > An: Johannes Radinger <JRadinger at gmx.at>, "R-help at r-project.org" 
>> <R-help at r-project.org>
>> > Betreff: RE: [R] Transform counts into presence/absence
>>
>> > Just use the logical operators.
>>
>>
>> of course, that simple :) . thank you!
>>
>>
>> >
>> > Counts <- c(1,0,21,2,0,0,234,2,0)
>> > Counts > 0
>> > 1 *(Counts > 0)
>> >
>> > ir. Thierry Onkelinx
>> > Instituut voor natuur- en bosonderzoek / Research Institute for 
>> Nature and
>> > Forest
>> > team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
>> > Kliniekstraat 25
>> > 1070 Anderlecht
>> > Belgium
>> > + 32 2 525 02 51
>> > + 32 54 43 61 85
>> > Thierry.Onkelinx at inbo.be
>> > www.inbo.be
>> >
>> > To call in the statistician after the experiment is done may be no 
>> more
>> > than asking him to perform a post-mortem examination: he may be 
>> able to say
>> > what the experiment died of.
>> > ~ Sir Ronald Aylmer Fisher
>> >
>> > The plural of anecdote is not data.
>> > ~ Roger Brinner
>> >
>> > The combination of some data and an aching desire for an answer 
>> does not
>> > ensure that a reasonable answer can be extracted from a given body 
>> of data.
>> > ~ John Tukey
>> >
>> >
>> > -----Oorspronkelijk bericht-----
>> > Van: r-help-bounces at r-project.org 
>> [mailto:r-help-bounces at r-project.org]
>> > Namens Johannes Radinger
>> > Verzonden: donderdag 31 mei 2012 13:13
>> > Aan: R-help at r-project.org
>> > Onderwerp: [R] Transform counts into presence/absence
>> >
>> > Hi,
>> >
>> > I am looking for a very easy way to transform a column in a 
>> dataframe from
>> > counts (eg. c(1,0,21,2,0,0,234,2,0)) into a binary form to get
>> > presence/absence values e.g. c(1,0,1,1,0,0,1,1,0). Is there a 
>> simple built-in
>> > function?
>> > or do I have do to it with a replaceement funciton using IF x > 0 
>> THEN 1
>> > etc.?
>> >
>> > /johannes
>> > --
>> >
>> > Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a
>> >
>> > ______________________________________________
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>>
>> Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
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>> PLEASE do read the posting guide 
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help at 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
> and provide commented, minimal, self-contained, reproducible code.