Interface SparseNdArray<T, U extends NdArray<T>>

Type Parameters:

T - the type that the array contains

U - the type of dense NdArray

All Superinterfaces:

NdArray<T>, Shaped

All Known Implementing Classes:

AbstractSparseNdArray, BooleanSparseNdArray, BooleanSparseSlice, ByteSparseNdArray, ByteSparseSlice, DoubleSparseNdArray, DoubleSparseSlice, FloatSparseNdArray, FloatSparseSlice, IntSparseNdArray, IntSparseSlice, LongSparseNdArray, LongSparseSlice, ObjectSparseSlice, ShortSparseNdArray, ShortSparseSlice, SparseNdArray, SparseSlice

public interface SparseNdArray<T, U extends NdArray<T>>
extends NdArray<T>

Interface for Sparse Arrays

Method Summary

Modifier and Type	Method	Description
LongNdArray	getIndices()	Gets the Indices
U	getValues()	Gets the values.

Methods inherited from interface NdArray

copyFrom, copyTo, copyTo, elements, equals, get, getObject, scalars, set, setObject, slice, streamOfObjects, withShape

Methods inherited from interface Shaped

rank, shape, size

Method Details

getIndices

LongNdArray getIndices()

Gets the Indices

Indices are a A 2-D long array of shape [N, ndims], that specifies the indices of the elements in the sparse array that contain nonzero values (elements are zero-indexed).

For example, indices=[[1,3], [2,4]] specifies that the elements with indexes of coordinates [1,3] and [2,4] have nonzero values.

Returns:

the Indices

getValues

U getValues()

Gets the values.

Values are a 1-D array of any type and shape [N], that supplies the values for each element in indices.

For example, given indices=[[1,3], [2,4]], and values=[18, 3.6] specifies that element [1,3] of the sparse array has a value of 18, and element [2,4] of the sparse array has a value of 3.6.

Returns:

the values