Path to this page:

./

math/newmat,

*Newmat C++ Matrix Library*

**Branch:** pkgsrc-2009Q3,

**Version: **10nb1,

**Package name:** newmat-10nb1,

**Maintainer: **pkgsrc-usersThis C++ library is intended for scientists and engineers who need to

manipulate a variety of types of matrices using standard matrix operations.

Emphasis is on the kind of operations needed in statistical calculations such

as least squares, linear equation solve and eigenvalues.

It supports matrix types: Matrix (rectangular matrix); UpperTriangularMatrix;

LowerTriangularMatrix; DiagonalMatrix; SymmetricMatrix; BandMatrix;

UpperBandMatrix; LowerBandMatrix; SymmetricBandMatrix; IdentityMatrix;

RowVector; ColumnVector.

The library includes the operations *, +, -, *=, +=, -=, Kronecker product,

Schur product, concatenation, inverse, transpose, conversion between types,

submatrix, determinant, Cholesky decomposition, QR triangularisation, singular

value decomposition, eigenvalues of a symmetric matrix, sorting, fast Fourier

and trig. transforms, printing and an interface with Numerical Recipes in C.

It is intended for matrices in the range 10 x 10 to the maximum size your

machine will accommodate in a single array. The package works for very small

matrices but becomes rather inefficient. A lazy evaluation approach to

evaluating matrix expressions is used to improve efficiency and reduce use of

temporary storage.

### Master sites:

### Version history: (Expand)

- (
**2009-10-17**) Package has been reborn - (
**2009-10-16**) Package added to pkgsrc.se, version **newmat-10nb1** (created)