GNU Octave Manual Version 3by John W. Eaton, David Bateman, Søren Hauberg Paperback (6"x9"), 568 pages ISBN 095461206X RRP £24.95 ($39.95) |

## 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`-
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 section 5 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

ISBN 095461206X | GNU Octave Manual Version 3 | See the print edition |