[datatable-help] Construct a new data table from another

[Frank S.]

Hi everyone,
 
For instance, let's suppose I have the an initial data frame DF, and I want to
rename and reorder some of its columns, so that the desired result is
expressed by DF2:
 
 
set.seed(100)
DF = data.frame(A=letters[1:5],B=rnorm(5),C=rexp(5),D=runif(5))
DF2 <- data.frame(a=DF[,1],d=DF[,4],B=DF[,2])

If I do the equivalent operations under data table format, I'm onñy able to obtain
the same result with the following code:
 
 
set.seed(100)
DT = data.table(A=letters[1:5],B=rnorm(5),C=rexp(5),D=runif(5))
DT2 <- data.table(a=DT[,1,with=FALSE],d=DT[,4,with=FALSE],B=DT[,2,with=FALSE])
 
 
Please, is it possible to get the same result with a more simply code?
Thanks!
 		 	   		  
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