# Matrix

## Definition of Matrix

Matrix: A matrix (plural matrices) is a rectangular array of numbers, symbols, or other objects. The individual items in a matrix are called its elements. Related: “The Matrix” is an awesome movie from 1999.

## How is a Matrix used?

A matrix is an array of numbers or other data used in mathematics and computer science. It is a mathematical object that can be used to represent any set of related data. In linear algebra, matrices are used to solve linear equations and can be used to simplify computations such as finding the inverse of a matrix. Matrices are also important components in data analysis, where they allow for efficient organization and manipulation of a collection of data. For example, when performing machine learning tasks such as classification or clustering, matrices are essential for storing the input data and providing structure to it. They also act as a tool for building models and making predictions from training data. Besides being limited to machine learning tasks, matrices can also be useful in other fields like image processing, scientific computing, and graph theory.

Matrices come in different shapes and sizes, ranging from two-dimensional square matrices to higher dimensional rectangular ones. A matrix is made up of rows that contain columns of information values along with the column header names (or row header names). Each element (value) inside a matrix is referred to as an entry or cell. Depending on the application at hand, some matrices might have more than just numerical entries – they could include symbols or strings instead. The number of rows in a matrix is known as its order while the number of columns refers to its dimensionality. Moreover, each entry within the matrix may have additional properties associated with it such as its magnitude or sign which can be used for further calculations if needed.