Irregular matrix

An irregular matrix, or ragged matrix, is a matrix that has an different number of elements in each row. Ragged matrices are inconvenient for standard linear algebra, since important matrix transformations cannot be performed on them, but they are usefull in computing.

For example, the following is an irregular matrix:

${\begin{bmatrix}1&31&12&-3\\7&2\\1&2&2\end{bmatrix}}$

See also

• Regular matrix
• Sparse matrix