Package org.apache.mahout.math

Core base classes; Operations on primitive arrays such as sorting, partitioning and permuting.

See:
Description

Interface Summary

Matrix	The basic interface including numerous convenience functions
Vector	The basic interface including numerous convenience functions NOTE: All implementing classes must have a constructor that takes an int for cardinality and a no-arg constructor that can be used for marshalling the Writable instance NOTE: Implementations may choose to reuse the Vector.Element in the Iterable methods
Vector.Element	A holder for information about a specific item in the Vector.
VectorIterable

Class Summary

AbstractMatrix	A few universal implementations of convenience functions
AbstractVector	Implementations of generic capabilities like sum of elements and dot products
Algebra
CholeskyDecomposition	Cholesky decomposition shamelessly ported from JAMA.
ConstantVector	Implements a vector with all the same values.
DenseMatrix	Matrix of doubles implemented using a 2-d array
DenseVector	Implements vector as an array of doubles
DiagonalMatrix
GenericPermuting	Deprecated. until unit tests are in place.
MatrixSlice
MatrixVectorView	Provides a virtual vector that is really a row or column or diagonal of a matrix.
MatrixView	Implements subset view of a Matrix
MurmurHash	This is a very fast, non-cryptographic hash suitable for general hash-based lookup.
MurmurHash3	This produces exactly the same hash values as the final C++ version of MurmurHash3 and is thus suitable for producing the same hash values across platforms.
NamedVector
OrthonormalityVerifier
PermutedVectorView	Provides a permuted view of a vector.
PivotedMatrix	Matrix that allows transparent row and column permutation.
QRDecomposition	partially deprecated until unit tests are in place.
RandomAccessSparseVector	Implements vector that only stores non-zero doubles
RandomTrinaryMatrix	Random matrix.
SequentialAccessSparseVector	Implements vector that only stores non-zero doubles as a pair of parallel arrays (OrderedIntDoubleMapping), one int[], one double[].
SingularValueDecomposition
SparseColumnMatrix	sparse matrix with general element values whose columns are accessible quickly.
SparseMatrix	Doubly sparse matrix.
SparseRowMatrix	sparse matrix with general element values whose rows are accessible quickly.
VectorView	Implements subset view of a Vector

Exception Summary

CardinalityException	Exception thrown when there is a cardinality mismatch in matrix or vector operations.
IndexException	Exception thrown when a matrix or vector is accessed at an index, or dimension, which does not logically exist in the entity.

Package org.apache.mahout.math Description

Core base classes; Operations on primitive arrays such as sorting, partitioning and permuting.