On Mon, 4 Aug 2008, Etienne B. Racine wrote:
Even if it's not so elegant, I will bind it in a function, so I don't have to
bother with that anymore. I think there should be a simple function in R to
initialize an empty data frame. From what I've read, it is a recurrent
question on that list.
Not from what I have seen. But it is easy with data.frame
colname.list <- paste("A",1:5,sep="") # note this is not a list.
cols <- lapply(colname.list, function(x) numeric(0))
names(cols) <- colname.list
do.call("data.frame", cols)
#Create an empty data frame from a header list
empty.df<- function(header){
df<-data.frame(matrix(matrix(rep(1,length(header)),1),1))
colnames(df)<-header
return(df[NULL,])
}
# Usage
new.df <- empty.df(paste("A",1:5,sep=""))
new.df
[1] A1 A2 A3 A4 A5
<0 rows> (or 0-length row.names)
Thanks again,
Etienne
milton ruser wrote:
Hi Etienne
It is not so elegant, bu I think that work.
colname.list<-paste("A",1:5,sep="")
df<-data.frame(matrix(matrix(rep(1,length(colname.list)),1),1))
df
colnames(df)<-colname.list
df
df<-df[-1,]
df
Cheers,
Miltinho Astronauta
Brazil
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