A QR decomposition calculator is a tool that can be used to find the QR decomposition of a matrix. The QR decomposition is a factorization of a matrix into the product of two matrices: a unitary matrix and an upper triangular matrix. The unitary matrix has orthonormal columns, and the upper triangular matrix is square and has positive diagonal elements.
The QR decomposition is useful for solving systems of linear equations, finding eigenvalues and eigenvectors, and computing matrix inverses. It is also used in a variety of applications, such as image processing, signal processing, and data analysis.