What does Nan stand for?
NaN, an acronym for Not a Number is an exception that usually occurs in the cases when an expression results in a number that is undefined or can’t be represented. It is used for floating-point operations. For example: The square root of negative numbers; Division by zero; Taking the log of zero or a negative number etc.
Is Nan a real word?
Systematic use of NaNs was introduced by the IEEE 754 floating-point standard in 1985, along with the representation of other non-finite quantities such as infinities . In mathematics, zero divided by zero is undefined as a real number, and is therefore represented by NaN in computing systems.
What does Nan mean in coding?
What does NaN mean in code? NaN means "Not a Number" and is the result of undefined operations on floating point numbers like for example dividing zero by zero. (Note that while dividing a non-zero number by zero is also usually undefined in mathematics, it does not result in NaN but in positive or negative infinity).
What does Nan mean in MATLAB?
nanmean
- Syntax. If X is a vector, then nanmean (X) is the mean of all the non- NaN elements of X. ...
- Input Arguments. Input data, specified as a scalar, vector, matrix, or multidimensional array. ...
- Output Arguments. Mean values, returned as a scalar, vector, matrix, or multidimensional array.
- Tips. ...
Whats does NaN mean?
Not a NumberIn computing, NaN (/næn/), standing for Not a Number, is a member of a numeric data type that can be interpreted as a value that is undefined or unrepresentable, especially in floating-point arithmetic.
What do NaN mean in a text?
Slang / Jargon (1) Acronym. Definition. NAN. Not A Number.
What is NaN in bank account?
NaN = Not a Number so hopefully this will work.
Is NaN a name?
The name Nan is primarily a female name of English origin that means Grace. Diminutive form of Anne or Nancy.
Is NaN A British word?
From Longman Dictionary of Contemporary Englishnan1 /næn/ (also nanna) /ˈnænə/ noun [countable] British English informal grandmother – used by children SYN nannyExamples from the Corpusnan• Giggling Sheila his nan called her.
What does NaN mean in payment?
NaN usually means Not a Number.
Why NaN is a number?
NaN stands for Not a Number. It is a value of numeric data types (usually floating point types, but not always) that represents the result of an invalid operation such as dividing by zero. Although its names says that it's not a number, the data type used to hold it is a numeric type.
How do I remove NaN error?
Q: How to remove NaN error in JavaScript? Answer: You can use if conditions with isNaN() function to remove Nan error: Note: Number. isNaN() doesn't convert the values to a Number.
What does nan mean in math?
In computing, NaN ( / næn / ), standing for Not a Number, is a member of a numeric data type that can be interpreted as a value that is undefined or unrepresentable, especially in floating-point arithmetic.
When was the NaN introduced?
Systematic use of NaNs was introduced by the IEEE 754 floating-point standard in 1985, along with the representation of other non-finite quantities such as infinities . In mathematics, zero divided by zero is undefined as a real number, and is therefore represented by NaN in computing systems. The square root of a negative number is not ...
What is a signaling NAN?
Signaling NaNs, or sNaNs, are special forms of a NaN that, when consumed by most operations, should raise the invalid operation exception and then, if appropriate, be "quieted" into a qNaN that may then propagate. They were introduced in IEEE 754. There have been several ideas for how these might be used:
What is the predicate for a NaN operand?
The other standard comparison predicates are all signaling if they receive a NaN operand. The standard also provides non-signaling versions of these other predicates. The predicate isNaN ( x) determines if a value is a NaN and never signals an exception, even if x is a signaling NaN.
What is the predicate for comparing with a NaN?
A comparison with a NaN always returns an unordered result even when comparing with itself. The comparison predicates are either signaling or non-signaling on quiet NaN operands; the signaling versions signal the invalid operation exception for such comparisons. The equality and inequality predicates are non-signaling so x = x returning false can be used to test if x is a quiet NaN. The other standard comparison predicates are all signaling if they receive a NaN operand. The standard also provides non-signaling versions of these other predicates. The predicate isNaN ( x) determines if a value is a NaN and never signals an exception, even if x is a signaling NaN.
What is a quiet NAN?
Quiet NaN. Quiet NaNs, or qNaNs, do not raise any additional exceptions as they propagate through most operations. The exceptions are where the NaN cannot simply be passed through unchanged to the output, such as in format conversions or certain comparison operations.
Is NaN the same as infinity?
In floating-point calculations, NaN is not the same as infinity, although both are typically handled as special cases in floating-point representations of real numbers as well as in floating-point operations.
What is Qhapaq Nan?
Qhapaq Nan, the Andean Road System, is an extraordinary road network through one of the world's most extreme geographical terrains used over several centuries by caravans, travellers, messengers, armies and whole population groups amounting up to 40,000 people. Celebrating Peru's Qhapaq Nan. NAN had also reported that the management of some ...
Who was Nan's only living relative?
ached she It had been left to Kay, Nan 's only living relative, to break the news that she was going straight into a care home after hospital due to her failing vision, and that her bungalow would have to be sold. the flower box; Now Nan could take a little patch of garden with her.
Why does Nan go on vacation with Martin?
In the second half of the finale, Nan goes on a vacation with Martin to take a break from the pressures of a major decision at work and the mess she's made of her life.
Acronyms & Abbreviations
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What does a NAN mean?
NaN is short for N ot a N umber. NaN indicates that the monitoring system is not receiving any numeric data. There can be several causes for receiving a NaN:
What is a NAN?
NaN is short for N ot a N umber. NaN indicates that the monitoring system is not receiving any numeric data. There can be several causes for receiving a NaN: 1 The collectd service has stopped running. 2 The Server has crashed due to an application failure. 3 The instance has been corrupted due to a hardware failure from Amazon.
Overview
In computing, NaN , standing for Not a Number, is a member of a numeric data type that can be interpreted as a value that is undefined or unrepresentable, especially in floating-point arithmetic. Systematic use of NaNs was introduced by the IEEE 754 floating-point standard in 1985, along with the representation of other non-finite quantities such as infinities.
In mathematics, zero divided by zero is undefined and is therefore represented by NaN in computi…
Floating point
In floating-point calculations, NaN is not the same as infinity, although both are typically handled as special cases in floating-point representations of real numbers as well as in floating-point operations. An invalid operation is also not the same as an arithmetic overflow (which might return an infinity) or an arithmetic underflow (which would return the smallest normal number, a subnormal number, or zero).
Function definition
There are differences of opinion about the proper definition for the result of a numeric function that receives a quiet NaN as input. One view is that the NaN should propagate to the output of the function in all cases to propagate the indication of an error. Another view, and the one taken by the ISO C99 and IEEE 754-2008 standards in general, is that if the function has multiple arguments and the output is uniquely determined by all the non-NaN inputs (including infinity), then that val…
Integer NaN
Most fixed-size integer formats cannot explicitly indicate invalid data. In such a case, when converting NaN to an integer type, the IEEE 754 standard requires that an invalid operation exception be signaled. For example in Java, such operations throw instances of java.lang.ArithmeticException. In C, they lead to undefined behavior, but if annex F is supported, the operation yields an "invalid" floating-point exception (as required by the IEEE standard) and a…
Display
Different operating systems and programming languages may have different string representations of NaN.
Since, in practice, encoded NaNs have a sign, a quiet/signaling bit and optional 'diagnostic information' (sometimes called a payload), these will occasionally be found in string representations of NaNs, too. Some examples are:
Encoding
In IEEE 754 standard-conforming floating-point storage formats, NaNs are identified by specific, pre-defined bit patterns unique to NaNs. The sign bit does not matter. Binary format NaNs are represented with the exponential field filled with ones (like infinity values), and some non-zero number in the significand field (to make them distinct from infinity values). The original IEEE 754 standard from 1985 (IEEE 754-1985) only described binary floating-point formats, and did not sp…
External links
• Not a Number, foldoc.org
• IEEE 754-2008 Standard for Floating-Point Arithmetic (subscription required)
• IEEE 754-2019 Standard for Floating-Point Arithmetic (subscription required)