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From Xiangrui Meng <>
Subject Re: sparse x sparse matrix multiplication
Date Wed, 05 Nov 2014 18:13:07 GMT
You can use breeze for local sparse-sparse matrix multiplication and
then define an RDD of sub-matrices

RDD[(Int, Int, CSCMatrix[Double])] (blockRowId, blockColId, sub-matrix)

and then use join and aggregateByKey to implement this feature, which
is the same as in MapReduce.


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