Hi Yanbo, Thanks for the reply. I thought i might be missing something. Anyway i moved to using scala since it is the complete API.
Best Regards, Pulasthi On Tue, Sep 22, 2015 at 7:03 AM, Yanbo Liang <yblia...@gmail.com> wrote: > This is due to the distributed matrices like > BlockMatrix/RowMatrix/IndexedRowMatrix/CoordinateMatrix do > not provide Java friendly constructors. I have file a SPARK-10757 > <https://issues.apache.org/jira/browse/SPARK-10757> to track this issue. > > 2015-09-18 3:36 GMT+08:00 Pulasthi Supun Wickramasinghe < > pulasthi...@gmail.com>: > >> Hi All, >> >> I am new to Spark and i am trying to do some BlockMatrix operations with >> the Mllib API's. But i can't seem to create a BlockMatrix with the java >> API. I tried the following >> >> Matrix matrixa = Matrices.rand(4, 4, new Random(1000)); >> List<Tuple2<Tuple2<Integer,Integer>,Matrix>> list = new >> ArrayList<Tuple2<Tuple2<Integer, Integer>, Matrix>>(); >> Tuple2<Integer,Integer> intTuple = new Tuple2<Integer, Integer>(0,0); >> Tuple2<Tuple2<Integer,Integer>,Matrix> tuple2MatrixTuple2 = new >> Tuple2<Tuple2<Integer, Integer>, Matrix>(intTuple,matrixa ); >> list.add(tuple2MatrixTuple2); >> JavaRDD<Tuple2<Tuple2<Integer, Integer>, Matrix>> rdd = sc.parallelize(list); >> >> BlockMatrix blockMatrix = new BlockMatrix(rdd,2,2); >> >> >> but since BlockMatrix only >> takes >> "RDD<scala.Tuple2<scala.Tuple2<java.lang.Object,java.lang.Object>,Matrix>>" >> this code does not work. sc.parallelize() returns a JavaRDD so the two >> are not compatible. I also couldn't find any code samples for this. Any >> help on this would be highly appreciated. >> >> Best Regards, >> Pulasthi >> -- >> Pulasthi S. Wickramasinghe >> Graduate Student | Research Assistant >> School of Informatics and Computing | Digital Science Center >> Indiana University, Bloomington >> cell: 224-386-9035 >> > > -- Pulasthi S. Wickramasinghe Graduate Student | Research Assistant School of Informatics and Computing | Digital Science Center Indiana University, Bloomington cell: 224-386-9035
