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Application Programming: Building Cross-Platform Applications |
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The detection of math errors, such as division by zero, overflow, and attempting to take the logarithm of a negative number, is hardware and operating system dependent. Some systems trap more errors than other systems. Beginning with version 5.1, IDL uses the IEEE floating-point standard on all supported systems. As a result, IDL always substitutes the special floating-point values NaN and Infinity when it detects a math error. (See Special Floating-Point Values for details on NaN and Infinity.)
For information on debugging math errors, see Math Errors.
IDL Online Help (March 06, 2007)