[R] (no subject)

[Prof Brian Ripley]

data[-indexZZ,] as grep returns indices of the matching rows.

On Wed, 6 Aug 2003, Nolwenn Le Meur wrote:

> Hi everybody,
> 
> Hope your are not all on holyday because I've got a problem that is going to
> drive me crazy...

Reading the documentation would avoid that!

> I would like to remove some rows from a dataframe. The rows correspond to
> some
> specific indexes which I can get by looking at the name in the first column
> of my dataset. But I manage to get only the opposite of what I really want
> (function #1)
> 
> #Function#1:
> remove.func<-function(data){
> Name<-as.character(data[,1])
> indexZZ<-grep("ZZ",Name,value=FALSE)
> data<-data[indexZZ,] # give me what I don't want
> print(slide)
> }
> 
> #Function#2:
> remove.func<-function(data,Name){
> Name<-as.character(data[,1])
> indexZZ<-grep("ZZ",Name,value=FALSE)
> data<-data[!indexZZ,] #doesn't work, give an empty dataframe
> print(slide)
> }
> 
> Thanks :|
> 
> Nolwenn Le Meur
> 
> ********************************************
> Nolwenn Le Meur
> INSERM U533
> Faculté de médecine
> 1, rue Gaston Veil
> 44035 Nantes Cedex 1
> France
> 
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> 
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> 

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595