Erases a range of rows or columns
void erase( int dim, size_t b, size_t e );
Dimension number. Specifies in which dimension the selected range will be erased. In Excel, 0 corresponds to the number of rows, and 1 corresponds to the number of columns.
Index of the first row or column to be erased.
Index of the first row or column beyond the range to be erased. The number of rows or columns erased will be (e - b).
This method the size of a specified dimension of the matrix.