[R] extracting submatrix from a bigger one

Rui Barradas ruipbarradas at sapo.pt
Mon Jun 24 19:16:05 CEST 2013


You don't have a sub-data.frame, what you have is a list, with each 
element of that list a df. Try to see, for instance, result[[1]]. This 
should be a data.frame corresponding to the first ID.

Rui Barradas

Em 24-06-2013 18:03, matteo escreveu:
> Hi,
>> result <- lapply(unique(dataset$ID), function(uid) dataset[dataset$ID
>> == uid, ])
> Ok, I have the element result as a list
>> names(result) <- unique(dataset$ID)
> Nothing happens. I don't have any submatrix...
> Matteo

More information about the R-help mailing list