hex.la

Class DMatrix

java.lang.Object

hex.la.DMatrix

public class DMatrix
extends java.lang.Object

Created by tomasnykodym on 11/13/14. Distributed matrix operations such as (sparse) multiplication and transpose.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DMatrix.MatrixMulJob Compute x %*% y for two matrices x,y.
static class	DMatrix.MatrixMulStats Info about matrix multiplication currently in progress.
static class	DMatrix.MatrixMulTsk
static class	DMatrix.TransposeTsk (MR)Task performing the matrix transpose.

Constructor Summary

Constructors

Constructor and Description
DMatrix()

Method Summary

Methods

Modifier and Type	Method and Description
static Frame	mmul(Frame x, Frame y)
static Frame	transpose(Frame src) Transpose the Frame as if it was a matrix (i.e.
static Frame	transpose(Frame src, Frame tgt) Transpose the Frame as if it was a matrix (rows <-> columns).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DMatrix

public DMatrix()

Method Detail

transpose

public static Frame transpose(Frame src)

Transpose the Frame as if it was a matrix (i.e. rows become coumns). Must be all numeric, currently will fail if there are too many rows ( >= ~.5M). Result will be put into a new Vectro Group and will be balanced so that each vec will have (4*num cpus in the cluster) chunks.

Parameters:

src -

Returns:

transpose

public static Frame transpose(Frame src,
              Frame tgt)

Transpose the Frame as if it was a matrix (rows <-> columns). Must be all numeric, will fail if there are too many rows ( >= ~.5M). Result is made to be compatible (i.e. the same vector group and chunking) with the target frame.

Parameters:

src -

Returns:

mmul

public static Frame mmul(Frame x,
         Frame y)