MATLAB:Logical Operators

Logical operators in MATLAB are those that link logical statements together and return true (1) or false (0) in a logical matrix depending upon the nature of the logical operator and the value of the components. Many times, logical operators are used to link together the results of several relational operators.

Logical Operators

There are four main logical operators in MATLAB:

Name	Symbol	Example with symbol	Example in code	Text description
NOT	~	~A	not(A)	True if A is false
AND	&	A & B	and(A, B)	True if both A and B are true
OR	|	A | B	or(A, B)	True if either A or B (or both!) are true
XOR			xor(A, B)	True if either A or B (but NOT both!) are true

The following table shows the results of four different pairs of input values to the logical operators above:

A	B	~A	~B	A & B	A | B	xor(A, B)
0	0	1	1	0	0	0
0	1	1	0	0	1	1
1	0	0	1	0	1	1
1	1	0	0	1	1	0

Common Errors

The most common errors with logical operators involve the order of operations. In the absence of parenthesis, any NOT operations go first, followed by AND, then finally OR.

Questions

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