jsmat

Greg Hewgill http://hewgill.com

jsmat is a direct port of Jama (http://math.nist.gov/javanumerics/jama/) to Javascript.

The Matrix class provides general purpose matrix arithmetic functions, plus the following five decompositions:

- Cholesky Decomposition of symmetric, positive definite matrices
- LU Decomposition (Gaussian elimination) of rectangular matrices
- QR Decomposition of rectangular matrices
- Eigenvalue Decomposition of both symmetric and nonsymmetric square matrices
- Singular Value Decomposition of rectangular matrices

Example

The following simple example solves a 3x3 linear system Ax=b and computes the norm of the residual.

var array = [[1.,2.,3],[4.,5.,6.],[7.,8.,10.]]; 
var A = new Matrix(array); 
var b = Matrix.random(3,1); 
var x = A.solve(b); 
var Residual = A.times(x).minus(b); 
var rnorm = Residual.normInf();

Tests

The test.js module implements a test suite. Run with Rhino as:

java -cp js.jar org.mozilla.javascript.tools.shell.Main -debug -w test.js

Authors

Jama was originally designed and implemented by Joe Hicklin, Cleve Moler, and Peter Webb from The MathWorks and Ronald F. Boisvert, Bruce Miller, Roldan Pozo, and Karin Remington from NIST.

The translation from Java to Javascript was done by Greg Hewgill.