A suggestion to improve ifelse behaviour with vector yes/noarguments
there is nothing problematic there! According to the help-page of
ifelse(), in the Details section you get:
"If yes or no are too short, their elements are recycled."
^^^^^^^^
and this is what you get in your example.
Best,
Dimitris
----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/16/336899
Fax: +32/16/337015
Web: http://www.med.kuleuven.ac.be/biostat/
http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm
----- Original Message -----
From: "M??kinen Jussi" <Jussi.Makinen at valtiokonttori.fi>
To: <r-help at stat.math.ethz.ch>
Sent: Tuesday, May 31, 2005 4:15 PM
Subject: [R] A suggestion to improve ifelse behaviour with vector
yes/noarguments
Dear All, I luckily found the following feature (or problem) when tried to apply ifelse-function to an ordered data.
test <- c(TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, FALSE) ifelse(test, 0, 1:4)
[1] 0 0 0 4 1 2 3
It roots into the ifelse-syntax: ans[!test & !nas] <- rep(no, length.out = length(ans))[!test & !nas] Would it be possible to disable this feature in the next R-version? For instance change the code to be: ans[!test & !nas] <- rep(no, length.out = length(ans[!test & !nas])) which seems to solve the problem. Best regards, Jussi M??kinen Jussi M??kinen Analyst State Treasury, Finland www.statetreasury.fi mailto:jussi.makinen at valtiokonttori.fi
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