nag_create_infinity (x07bac) (PDF version)
x07 Chapter Contents
x07 Chapter Introduction
NAG Library Manual

NAG Library Function Document

nag_create_infinity (x07bac)

 Contents

    1  Purpose
    7  Accuracy
    10  Example

1  Purpose

nag_create_infinity (x07bac) creates a signed infinite value.

2  Specification

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

3  Description

nag_create_infinity (x07bac) sets x to be positive or negative infinity.

4  References

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

5  Arguments

1:     isign IntegerInput
On entry: determines the sign of the infinity to be created.
If isign is greater than or equal to 0, a positive infinity is returned, otherwise a negative infinity is returned.
2:     x double *Output
On exit: the required infinite value.

6  Error Indicators and Warnings

None.

7  Accuracy

Not applicable.

8  Parallelism and Performance

Not applicable.

9  Further Comments

None.

10  Example

See Section 10 in nag_is_finite (x07aac).

nag_create_infinity (x07bac) (PDF version)
x07 Chapter Contents
x07 Chapter Introduction
NAG Library Manual

© The Numerical Algorithms Group Ltd, Oxford, UK. 2015