Package com.yahoo.tensor

Class DirectIndexedAddress

java.lang.Object

com.yahoo.tensor.DirectIndexedAddress

public final class DirectIndexedAddress
extends Object

Utility class for efficient access and iteration along dimensions in Indexed tensors. Usage: Use setIndex to lock the indexes of the dimensions that don't change in this iteration. long base = addr.getDirectIndex(); long stride = addr.getStride(dimension) i = 0...size_of_dimension double value = tensor.get(base + i * stride);

Author:

baldersheim

Method Summary

Modifier and Type	Method	Description
long	getDirectIndex()	Retrieve the index that can be used for direct lookup in an indexed tensor.
long[]	getIndexes()
long	getStride(int dimension)	returns the stride to be used for the given dimension
static DirectIndexedAddress	of(DimensionSizes sizes)
void	setIndex(int dimension, int index)	Sets the current index of a dimension

Methods inherited from class java.lang.Object

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

Method Details

of

public static DirectIndexedAddress of(DimensionSizes sizes)

setIndex

public void setIndex(int dimension,
 int index)

Sets the current index of a dimension

getDirectIndex

public long getDirectIndex()

Retrieve the index that can be used for direct lookup in an indexed tensor.

getIndexes

public long[] getIndexes()

getStride

public long getStride(int dimension)

returns the stride to be used for the given dimension