|GNU Octave Manual Version 3|
by John W. Eaton, David Bateman, Søren Hauberg
Paperback (6"x9"), 568 pages
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
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, ...
See also isequal
|ISBN 095461206X||GNU Octave Manual Version 3||See the print edition|