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Irregular matrix : ウィキペディア英語版
Irregular matrix
An irregular matrix, or ragged matrix, can be described as a matrix that has a different number of elements in each row. Ragged matrices are not used in linear algebra, since standard matrix transformations cannot be performed on them, but they are useful as arrays in computing. Irregular matrices are typically stored using Iliffe vectors.
For example, the following is an irregular matrix:
:
\begin
1 & 31 & 12& -3 \\
7 & 2 \\
1 & 2 & 2
\end

== See also ==

* Matrix (mathematics)
* Regular matrix (disambiguation)
* Sparse matrix
* Array data structure

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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