A matrix model is a special RelTableModel object with 3 and only 3 fields: 2 of types 'row' and 'column' and the 3rd of your choice.
Value
A single logical: TRUE if x is a RelTableModel matrix object
A matrix model is a special RelTableModel object with 3 and only 3 fields: 2 of types 'row' and 'column' and the 3rd of your choice.
A single logical: TRUE if x is a RelTableModel matrix object