Transform counts into presence/absence
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:
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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 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.