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. Broadcasting rules apply. See Broadcasting. For example:
[1, 2; 3, 4] == [1, 3; 2, 4] ⇒ 1 0 0 1
According to broadcasting rules, 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.
For complex numbers, the following ordering is defined: z1 < z2 iff
abs(z1) < abs(z2) || (abs(z1) == abs(z2) && arg(z1) < arg(z2))
This is consistent with the ordering used by max, min and sort, but is not consistent with matlab, which only compares the real parts.
String comparisons may also be performed with the
function, not with the comparison operators listed above.
Return true if the two inputs are equal. This function is equivalent to
x == y.
Return true if all of x1, x2, ... are equal.
See also: isequalwithequalnans.
Assuming NaN == NaN, return true if all of x1, x2, ... are equal.
See also: isequal.