[R] Sparse Matrices in R

[Wolski]

Hi!
help.search("sparse matrix")


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

/E

*********** 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?
>>>Thanks,
>>> 
>>>Danny
>>>
>>>	[[alternative HTML version deleted]]
>>>
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>>>R-help at stat.math.ethz.ch mailing list
>>>https://stat.ethz.ch/mailman/listinfo/r-help
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Dipl. bio-chem. Witold Eryk Wolski             @         MPI-Moleculare Genetic   
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