mathjs/examples/sparse_matrices.js.md

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Sparse matrices

File: sparse_matrices.js

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

// 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 :)');