# Function matrix Create a Matrix. The function creates a new `math.Matrix` object from an `Array`. A Matrix has utility functions to manipulate the data in the matrix, like getting the size and getting or setting values in the matrix. Supported storage formats are 'dense' and 'sparse'. ## Syntax ```js math.matrix() // creates an empty matrix using default storage format (dense). math.matrix(data) // creates a matrix with initial data using default storage format (dense). math.matrix('dense') // creates an empty matrix using the given storage format. math.matrix(data, 'dense') // creates a matrix with initial data using the given storage format. math.matrix(data, 'sparse') // creates a sparse matrix with initial data. math.matrix(data, 'sparse', 'number') // creates a sparse matrix with initial data, number data type. ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `data` | Array | Matrix | A multi dimensional array `format` | string | The Matrix storage format ### Returns Type | Description ---- | ----------- Matrix | The created matrix ## Examples ```js let m = math.matrix([[1, 2], [3, 4]]) m.size() // Array [2, 2] m.resize([3, 2], 5) m.valueOf() // Array [[1, 2], [3, 4], [5, 5]] m.get([1, 0]) // number 3 ``` ## See also [bignumber](bignumber.md), [boolean](boolean.md), [complex](complex.md), [index](index.md), [number](number.md), [string](string.md), [unit](unit.md), [sparse](sparse.md)