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From Reza Zadeh <r...@databricks.com>
Subject Re: mllib CoordinateMatrix
Date Tue, 14 Oct 2014 21:02:15 GMT
Hello,

CoordinateMatrix is in its infancy, and right now is only a placeholder.

To get/set the value at (i,j), you should map the entries rdd using the
usual rdd map operation, and change the relevant entries.

To get the values on a specific row, you can call toIndexedRowMatrix(),
which returns a RowMatrix
<https://github.com/apache/spark/blob/master/mllib/src/main/scala/org/apache/spark/mllib/linalg/distributed/IndexedRowMatrix.scala>
with indices.

Best,
Reza


On Tue, Oct 14, 2014 at 1:18 PM, ll <duy.huynh.uiv@gmail.com> wrote:

> after creating a coordinate matrix from my rdd[matrixentry]...
>
> 1.  how can i get/query the value at coordiate (i, j)?
>
> 2.  how can i set/update the value at coordiate (i, j)?
>
> 3.  how can i get all the values on a specific row i, ideally as a vector?
>
> thanks!
>
>
>
>
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