Any elements of an index must be an integer no less than 1.
Normally an index also has an upper bound, so that no reference to
an non-existing element is made, unless the index expression
is used as an lvalue (see next subsection).
In particular,
for an
matrix,
a row index should be an integer within the range [1, m], and a column index
should be within the range [1, n], and an index value in a single-part
index expression should be within the range [1, mn].
>> A = [1, 3, 5, 7, 11, 13, 17, 19];
>> A[9]
Error 0 "9": index value 9 out of bound 1-8
>> A[9] = 23
1 3 5 7 11 13 17 19 23
oz
2009-12-22