Graphics Programs Reference
In-Depth Information
>> [a a(a)]
ans =
1
2
3
1
4
7
4
5
6
2
5
8
7
8
9
3
6
9
The colon symbol can be used as a single index to a matrix. Continuing
the previous example, if you type
a(:)
matlab interprets this as the columns of the
a
-matrix successively
strung out in a single long column:
>> a(:)
ans =
1
4
7
2
5
8
3
6
9
3.5 End as a subscript
To access the last element of a matrix along a given dimension, use
end
as a subscript (matlab version 5 or later). This allows you to go to the
final element without knowing in advance how big the matrix is. For
example:
>> q = 4:10
q=
4
5
6
7
8
9
10
>> q(end)
ans =
10
>> q(end-4:end)
ans =
6
7
8
9
10
>> q(end-2:end)
ans =
8
9
10
This technique works for two-dimensional matrices as well:
