nag_create_nan (x07bbc) (PDF version)
x07 Chapter Contents
x07 Chapter Introduction
NAG Library Manual

NAG Library Function Document

nag_create_nan (x07bbc)

▸▿ Contents

    1  Purpose
    2  Specification
    3  Description
    4  References
    5  Arguments
    6  Error Indicators and Warnings
    7  Accuracy
    8  Parallelism and Performance
    9  Further Comments
    10  Example

1  Purpose

nag_create_nan (x07bbc) creates a NaN (Not A Number).

2  Specification

#include <nag.h>
#include <nagx07.h>
void  nag_create_nan (Integer quiet, double *x)

3  Description

nag_create_nan (x07bbc) sets x to be a quiet or a signalling NaN (Not A Number).

4  References

IEEE (2008) Standard for Floating-Point Arithmetic IEEE Standard 754-2008 IEEE, New York.

5  Arguments

1:     quiet – IntegerInput
On entry: determines whether a quiet or a signalling NaN is to be created. If quiet=1, the returned NaN is quiet, otherwise it is signalling. See reference IEEE (2008) for the distinction between the two kinds.
2:     x – double *Output
On exit: the required NaN value.

6  Error Indicators and Warnings

None.

7  Accuracy

Not applicable.

8  Parallelism and Performance

nag_create_nan (x07bbc) is not threaded in any implementation.

9  Further Comments

None.

10  Example

See Section 10 in nag_is_finite (x07aac).
nag_create_nan (x07bbc) (PDF version)
x07 Chapter Contents
x07 Chapter Introduction
NAG Library Manual
© The Numerical Algorithms Group Ltd, Oxford, UK. 2016