Transform counts into presence/absence
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.
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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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