MATLAB Operations on Matrices

Objective: To study arithmetic operation on matrices, relational operations on matrices, and logical operation on matrices.

Arithmetic Operators:

Examples:

Relational Operators:

Relational operators are used to representing conditions such as "space ? 0" and "result ? 25". They take two numerical (or string) operands. They yield a logical result (true or false).

The general form is: a1 op a2

a1 and a2 are arithmetic expressions, variables, or strings.

op is one of the following

Examples

Logical Operators:

• &&: Logical AND with shortcut evaluation.
  If the first expression is false, return false instead of calculating the second expression.
  It works only between scaler values.
  Faster because of partial evaluation.
• &: Logical AND
  Evaluates both expressions.
  It works with both scaler and array values.
• ||: Logical inclusive OR with shortcut evaluation.
  If the first expression is true, return true instead of calculating the second expression
  It works only between scaler values.
  Faster because of partial evaluation.
• |: Logical OR
  Evaluates both expressions.
  It works with both scaler and array values.
• XOR: Logical exclusive OR
  It returns true if and only if one operand is true and other is false.

Examples:

Logical functions:

• ischar(a): It returns true if a is character array otherwise false.
• isempty(a): It returns true if a is an empty array otherwise false.
• isinf(a): It returns true if a is infinite otherwise false.
• isnan(a): It returns true if a is not a number otherwise false.
• isnumeric(a): It returns true if a is a numerical array otherwise false.
• logical: It converts mathematical to logical.

Examples: