Comparison Ops - Untitled
Description: Untitled

Next: Boolean Expressions, Previous: Arithmetic Ops, Up: Expressions

### 8.4 Comparison Operators

Comparison operators compare numeric values for relationships such as equality. They are written using relational operators.

All of Octave's comparison operators return a value of 1 if the comparison is true, or 0 if it is false. For matrix values, they all work on an element-by-element basis. For example,

         [1, 2; 3, 4] == [1, 3; 2, 4]
              =>  1  0
                  0  1

If one operand is a scalar and the other is a matrix, the scalar is compared to each element of the matrix in turn, and the result is the same size as the matrix.

x`<` y
  True if x is less than y.
x`<=` y
  True if x is less than or equal to y.
x`==` y
  True if x is equal to y.
x`>=` y
  True if x is greater than or equal to y.
x`>` y
  True if x is greater than y.
x`!=` y
x`~=` y
x`<>` y
  True if x is not equal to y.

String comparisons may also be performed with the `strcmp` function, not with the comparison operators listed above. See Strings.

— Function File: isequal (x1, x2, ...)

> Return true if all of x1, x2, ... are equal.

> See also: isequalwithequalnans.

— Function File: isequalwithequalnans (x1, x2, ...)

> Assuming NaN == NaN, return true if all of x1, x2, ... are equal.

> See also: isequal.