Ragged matrix

A ragged matrix is a type of table-like data structure that doesn't have the same number of entries in each row. Imagine you had a table with 5 rows, but row 1 had 3 things in it, row 2 had 4 things in it, row 3 had 1 thing in it, etc. This table would not be considered a regular matrix because each row does not have the same number of items. It would be a ragged matrix.