SparseMatrix Multilpication

[Ekram Ali]

I could not find SparseMatrix Multilpication or addition function in flink ,please suggest how will perform multiplication and addition.

ex -[1 ,2 ,4],[2,5,7]

and i want to multiply by 5 in whole matrix so that every element multiply by 5.
same in case of addition
please suggest.

[Felix Neutatz]

Hi Ekram,

if you are refering to https://github.com/apache/flink/blob/d7b59d761601baba6765bb4fc407bcd9fd6a9387/flink-libraries/flink-ml/src/main/scala/org/apache/flink/ml/math/SparseMatrix.scala 

You could first convert it to a Breeze Matrix: https://github.com/apache/flink/blob/1753b1d25b4d943c1ffbe7c3fb40e56b840c4f7d/flink-libraries/flink-ml/src/main/scala/org/apache/flink/ml/math/Breeze.scala#L31

and then multiply. If you are talking about a distributed matrix vectorization, you need to implement it on your own.

Same applies to your question about Dense Matrices.

Best regards,

Felix

On Feb 7, 2017 18:34, "Ekram Ali" <[hidden email]> wrote:

I could not find SparseMatrix Multilpication or addition function in flink
,please suggest how will perform multiplication and addition.

ex -[1 ,2 ,4],[2,5,7]

and i want to multiply by 5 in whole matrix so that every element multiply
by 5.
same in case of addition
please suggest.



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