Displaying 4 results from an estimated 4 matches for "vectorx".
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vector
2007 Jul 06
3
?replace characters within vector data
Hi List,
I want replace characters within a vector. Outside R I could use sed,
but I'd like to automate it in R. For example
vectorx
xxxyyz
xxxyyza
xxxyyzzb
I want to change to:
vectorx
aaayyz
aaayyza
aaayyzzb
The obvious replace command only deals with whole data entries?
Any hints would be appreciated.
Thanks
Herry
2005 Dec 16
1
Vector of matrix
Dear statisticians,
I would like to save results for a "for loop" in a vector previously created.
My result would be of class "matrix".
I tried the following script:
Script:
#Creation of a previous vector
n.Tree<-2
VectorX<-rep(1,n.Tree)
#loop
for (i in 1:2) {
Ti<-MatOccurTree[Tree[i],1] #number of observation for Tree i
Xi<-matrix(data=1,nrow=Ti,ncol=2)
Xi[,2]<-treedata2$lnE[IdentTree==Tree[i]]
VectorX[i]<-Xi
}
Console:
> VectorX[i]<-Xi
Warning message:
le nombre d'objets à remplacer n...
2004 Dec 31
2
Supressing empty sections with Sweave
Dear useRs,
I'm writing regular survey reports using Sweave. Each
report has several sections along the lines of:
\section*{Disease X}
<<MapX,fig=TRUE,echo=FALSE>>=
image(vectorx,vectory,matrixz)
@
Notes with or without Sexpr{a}.
\vfill
\pagebreak
\section*{Disease Y}
<<MapY,fig=TRUE,echo=FALSE>>=
...etc.
Often one or more of the diseases is not observed (all
values in matrixz are 0), in which case I would prefer
not to display the section at all. Does a...
2010 May 28
3
how to create automatically names for vectors in a loop?
Hi,
I want to generate a number of vectors and store them with different names, like this:
x=1
while (x<100)
{
vector#x# = rnorm(100)
x=x+1
}
where each vector has, at its hand, instead of #x# a number which goes from 1 to 99.
How can I do this?
Thanks
Gabriele Zoppoli, MD
Ph.D. Fellow, Experimental and Clinical Oncology and Hematology, University of Genova, Genova, Italy
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