[R] Need help: Loading a large data set.

roger koenker roger at ysidro.econ.uiuc.edu
Sun Nov 23 21:41:36 CET 2008

Both  SparseM and Matrix have facilities for rbind and cbind
that allow you to concatenate pieces of sparse matrices together.

On Nov 23, 2008, at 2:19 PM, Atul Kulkarni wrote:

> Hi All,
> I am dealing with a large data set which translates in to a sparse  
> matrix, I
> want to load this data that is spread in approximately 17000+ files  
> each
> defining a row and each file has variable number of records that  
> come with
> its column number and the value that they store.
> I wish to load this data in memory from these files one by one. Is  
> there
> anyway I can do this in R, before I start processing? I am sure this  
> is not
> the first time R or the community is confronted with this kind of a  
> problem
> but I could not find the documentation for loading data in to sparse  
> matrix
> I found quite a few packages  for sparse matrix but they all were
> concentrating on how to do various operations with the matrix once the
> matrix is loaded. I need to first load the data in the system before  
> I can
> think about analysing.
> Regards,
> Atul.
> Graduate Student,
> Department of Computer Science,
> University of Minnesota Duluth,
> Duluth, MN, 55812.
> --------
> www.d.umn.edu/~kulka053
> 	[[alternative HTML version deleted]]
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