The IEEE Standard 754 defines a class of numbers known as NaN, or Not a Number. This value is used by the IRIS processing software to indicate missing data.
A floating-point value that is said to be "not a number" and contains an indeterminate quantity.
A special bit pattern produced when a floating-point operation cannot produce a meaningful result (for example, 0/0 produces a NaN). NaNs propagate through arithmetic operations.
Not-a-Number, the condition that results from a floating-point operation that has no mathematical meaning, such as infinity divided by infinity. The ON statement can be used to trap operations that result in NaN.
floating-point value that is represented by a sign bit fraction with at least one bit set to 1, and an exponent with all bits set to 1. See also signaling NaN (SNaN), quiet NaN (QNaN).
Acronym for “not a number.” Math coprocessors generate NANs when the result of an operation cannot be represented in IEEE format. For example, if two numbers being multiplied have a product larger than the maximum value permitted, the coprocessor returns a NAN instead of the product.
Not a Number, a computing expression for bit strings in numeric fields which do not interpret as numbers. It can be encountered by invalid calculations or used as a flag to prevent use of invalid values where no proper value exists.
number value representing Not-a-Number. See NaN.
This is a special value of the double and float data types that represents an undefined result of a mathematical operation, such as zero divided by zero.
Missing data or values that are indeterminate are assigned the place holder "NaN", standing for "Not a Number", according to IEEE-754. See http://en.wikipedia.org/wiki/NAN
Not-a-Number. The condition that results from a floating-point operation that has no mathematical meaning; for example, zero divided by zero.