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
    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_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

nag_create_infinity (x07bac) is not threaded in any implementation.

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. 2017