See
?is.element
?%in%
HTH,
Chuck
On Wed, 29 Apr 2009, 00alastair00 wrote:
Dear R-Help,
I have a data frame and a vector
df=data.frame(Letter=c(Z,Q,R,A,E,F), Number=c(11,32,4,1,9,3))
v=c(C,Q,R,A,E)
From df, I'd like to construct a subset of the field Number, with
deletions dictated by the vector, v, of letters. I've succeeded in doing
this for a single deletion (for example Letter=Q) with the following
df$Number[df$Letter != v[2]]
but am struggling do more than one at a time. For example,
df$Number[df$Letter != v[2:5]]
gives the error: Warning messages: 1: Is.na(e1) | is.na(e2) : longer
object length is not a multiple of shorter object length 2: In. Perhaps
there is a much easier way to approach this...
Any help would be greatly appreciated!
Alastair
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Charles C. Berry(858) 534-2098
Dept of Family/Preventive Medicine
E mailto:cbe...@tajo.ucsd.edu UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901
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