[R] Create data frame from header only

[Etienne B. Racine]

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.

#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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