[R] Sparse Matrices in R

Wolski wolski at molgen.mpg.de
Wed Sep 1 00:11:00 CEST 2004

help.search("sparse matrix")

graph2SparseM(graph)    Coercion methods between graphs and sparse
                        Class "tripletMatrix" sparse matrices in
                        triplet form
SparseM.hb(SparseM)     Harwell-Boeing Format Sparse Matrices
                        Image Plot for Sparse Matrices
etc .....


*********** REPLY SEPARATOR  ***********

On 8/31/2004 at 5:52 PM Danny Heuman wrote:

>>>I have data in i,j,r format, 
>>>where r is the value in location A[i,j] for some imaginary matrix A.
>>>I need to build this matrix A, but given the sizes of i and j, I believe
>>>that using a sparse format would be most adequate.
>>>Hopefully this will allow me to perform some basic matrix manipulation
>>>such as multiplication, addition, rowsums,  transpositions, subsetting
>>>etc etc.
>>>Is there any way to achieve this goal in R?
>>>	[[alternative HTML version deleted]]
>>>R-help at stat.math.ethz.ch mailing list
>>>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

Dipl. bio-chem. Witold Eryk Wolski             @         MPI-Moleculare Genetic   
Ihnestrasse 63-73 14195 Berlin                'v'    
tel: 0049-30-83875219                        /   \       
mail: witek96 at users.sourceforge.net        ---W-W----    http://www.molgen.mpg.de/~wolski 
      wolski at molgen.mpg.de

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