Would result in an error if f were called with one or twoĪrguments because Octave would be forced to try to evaluate both of the Overall truth value of the expression can be important. The fact that both operands may not be evaluated before determining the Warning: the truth value of an empty matrix is always false, If it isįalse, the expression boolean2 is evaluated and converted to a If it is true, the result of the overall expression is 1. The truth value of an empty matrix is always false Warning: there is one exception to the rule of evaluatingĪll ( boolean1(:)), which is when boolean1 is theĮmpty matrix. Otherwise, the result of the overall expression is 0. If it is true, the result of the overall expression Scalar using the equivalent of the operation all True, the expression boolean2 is evaluated and converted to a If it is false, the result of the overall expression is 0. Using the equivalent of the operation all ( boolean1(:)). The expression boolean1 is evaluated and converted to a scalar Short-circuit boolean operators work this way. Soon as the overall truth value can be determined. It is sometimes desirable to stop evaluating a boolean expression as While conditions, Octave’s element-by-element boolean operatorsĪre often sufficient for performing most logical operations. Previous: Element-by-element Boolean Operators, Up: Boolean Expressions Ĭombined with the implicit conversion to scalar values in if and
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