Graphics Programs Reference
In-Depth Information
>> q = [spiral(3) [10;20;30]]
q=
7
8
9
10
6
1
2
20
5
4
3
30
>> q(end,end)
ans =
30
>> q(2,end-1:end)
ans =
2
20
>> q(end-2:end,end-1:end)
ans =
9
10
2
20
3
30
>> q(end-1,:)
ans =
6
1
2
20
3.6 Deleting Rows or Columns
To get rid of a row or column set it equal to the empty matrix
[]
.
>>a=[123;456;789]
a=
1
2
3
4
5
6
7
8
9
>> a(:,2) = []
a=
1
3
4
6
7
9
3.7 Matrix Arithmetic
Matrices can be added and subtracted (they must be the same size).
>> b = 10*a
b=
10
30
40
60
70
90
