Divide by Zero

Infinity results from operations like division by zero and overflow, which lead to results too large to represent as conventional floating-point values. An attempt to divide a floating point number by zero will lead to +-infinity by the IEEE 754 floating point standard

while NaN returns the IEEE arithmetic representation for Not-a-Number (NaN). These result from operations which have undefined numerical results. The IEEE floating-point standard, supported by almost all modern floating-point units, specifies that every floating point arithmetic operation, including division by zero, has a well-defined result.

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James Tursa 2012-6-26

MATLAB certainly does it the way I want, which is to generate a real result for real inputs, and to let the h/w do the native IEEE calculation without inserting a lot of performance killing checks like Walter mentioned. I certainly would not want those checks to be the default if it significantly slowed performance. You can always manually check your results for NaN or Inf, and if you need it to stop then maybe do what Jan suggests.

Sharon 2012-6-27

+1 for the concise answer..

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