> > a<-as.data.frame(matrix(rnorm(100),nrow=10,ncol=10))
> > b<-which(a$V1>0.8)
> > a_indexb<-a[b,]
> > a_notIndexB<-a[!b,]
> > nrow(a_notIndexB)
> [1] 0
> a_notIndexB <- a[-b,]
> nrow(a_notIndexB)
[1] 9
cu
Philipp
--
Dr. Philipp Pagel
Lehrstuhl für Genomorientierte Bioinformatik
Tech
On Apr 28, 2008, at 10:40 AM, Georg Ehret wrote:
Dear R Community, A simple problem (for some of you): I wish to
index a
data.frame by all elements NOT in my index
E.g.:
a<-as.data.frame(matrix(rnorm(100),nrow=10,ncol=10))
b<-which(a$V1>0.8)
b
[1] 1 4 6 10
a_indexb<-a[b,]
a_notIndex
On 28.04.2008, at 16:40, Georg Ehret wrote:
E.g.:
a<-as.data.frame(matrix(rnorm(100),nrow=10,ncol=10))
b<-which(a$V1>0.8)
b
[1] 1 4 6 10
a_indexb<-a[b,]
a_notIndexB<-a[!b,]
nrow(a_notIndexB)
[1] 0
Indexing a on b is not a problem (a_indexb), but how can do get
only the
elements left
Dear R Community, A simple problem (for some of you): I wish to index a
data.frame by all elements NOT in my index
E.g.:
> a<-as.data.frame(matrix(rnorm(100),nrow=10,ncol=10))
> b<-which(a$V1>0.8)
> b
[1] 1 4 6 10
> a_indexb<-a[b,]
> a_notIndexB<-a[!b,]
> nrow(a_notIndexB)
[1] 0
Indexing a
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