mathjs/examples/sparse_matrices.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

// load math.js (using node.js)
var math = require('../index');

// create a sparse matrix
console.log('creating a 1000x1000 sparse matrix...');
var a = math.eye(1000, 1000, 'sparse');

// do operations with a sparse matrix
console.log('doing some operations on the sparse matrix...');
var b = math.multiply(a, a);
var c = math.multiply(b, math.complex(2, 2));
var d = math.transpose(c);
var e = math.multiply(d, a);

// we will not print the output, but doing the same operations
// with a dense matrix are very slow, try it for yourself.
console.log('already done');
console.log('now try this with a dense matrix :)');