Matrix Toolkit Java

Introduction

Matrix Toolkit Java (MTJ) is an open source Java software library for performing numerical linear algebra. The library contains a full set of standard linear algebra operations based off of BLAS and LAPACK code. Partial set of sparse operations is provided through the Templates project. The library can be configured to ran as a pure Java library or use machine-optimized through the Java Native Interface.

MTJ was originally developed by Bjørn-Ove Heimsund, who has taken a step back due to other commitments. The project webpage states that "(The new maintainers are) primarily concerned with keeping the library maintained, and fixing bugs as they are discovered. There is no road plan for future releases".

Usage Examples

Example of Singular Value Decomposition (SVD):

SVD svd = new SVD(matA.numRows(),matA.numColumns());
SVD s = svd.factor(matA);
DenseMatrix U = s.getU();
DenseMatrix S = s.getS();
DenseMatrix Vt = s.getVt();

Example of matrix multiplication:

DenseMatrix result = new DenseMatrix(matA.numRows(),matB.numColumns());
matA.mult(matB,result);

See also

• list of numerical analysis software