# Function pinv Calculate the Moore–Penrose inverse of a matrix. ## Syntax ```js math.pinv(x) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `x` | number | Complex | Array | Matrix | Matrix to be inversed ### Returns Type | Description ---- | ----------- number | Complex | Array | Matrix | The inverse of `x`. ### Throws Type | Description ---- | ----------- ## Examples ```js math.pinv([[1, 2], [3, 4]]) // returns [[-2, 1], [1.5, -0.5]] math.pinv([[1, 0], [0, 1], [0, 1]]) // returns [[1, 0, 0], [0, 0.5, 0.5]] math.pinv(4) // returns 0.25 ``` ## See also [inv](inv.md)