An interactive introduction to MATLAB

46 decision making

Listings 4.1 presents a simple example of using relational operators.

Listing 4.1: Simple relational operators

1 >> x = 5;

2 >> y = 10;

3 >> x<y

4 ans =

5 1

6 >> x>y

7 ans =

8 0

Comments:

• Lines 3 and 6 are called logical expression because the result can only be
  either true, represented by 1 , or false, represented by 0.

Listings 4.2–4.3 present more examples of using relational and logical operators.

Listing 4.2: Relational operators

1 >> x = [1 5 3 7];

2 >> y = [0 2 8 7];

3 >> k = x<y

4 k =

5 0 0 1 0

6 >> k = x<=y

7 k =

8 0 0 1 1

9 >> k = x>y

10 k =

11 1 1 0 0

12 >> k = x>=y

13 k =

14 1 1 0 1

15 >> k = x==y

16 k =

17 0 0 0 1

18 >> k = x~=y

19 k =

20 1 1 1 0

Listing 4.3: Logical operators

1 >> x = [1 5 3 7];

2 >> y = [0 2 8 7];

3 >> k = (x>y) & (x>4)

4 k =

5 0 1 0 0

6 >> k = (x>y) | (x>4)

7 k =

8 1 1 0 1