NAG C Library Function Document

nag_double_sort (m01cac)

1

Purpose

2

Specification

3

Description

4

References

5

Arguments

1:    $\mathbf{vec}\left[\mathbf{n}\right]$ – doubleInput/Output

On entry: elements of vec must contain real values to be sorted.

On exit: these values are rearranged into sorted order.

2:    $\mathbf{n}$ – size_tInput

On entry: the length of vec.

Constraint: $1\le \mathbf{n}\le \mathrm{MAX\_LENGTH}$, where $\mathrm{MAX\_LENGTH}$ is an implementation-dependent value for the maximum size of an array.

3:    $\mathbf{order}$ – Nag_SortOrderInput

On entry: specifies whether the array will be sorted into ascending or descending order.

Constraint: $\mathbf{order}=\mathrm{Nag\_Ascending}$ or $\mathrm{Nag\_Descending}$.

4:    $\mathbf{fail}$ – NagError *Input/Output

The NAG error argument (see Section 3.7 in How to Use the NAG Library and its Documentation).

6

Error Indicators and Warnings

NE_BAD_PARAM

On entry, order had an illegal value.

NE_INT_ARG_GT

On entry, $\mathbf{n}=〈\mathit{\text{value}}〉$.
Constraint: $\mathbf{n}\le 〈\mathit{\text{value}}〉$, an implementation-dependent size that is printed in the error message.

NE_INT_ARG_LT

On entry, $\mathbf{n}=〈\mathit{\text{value}}〉$.
Constraint: $\mathbf{n}\ge 1$.

7

Accuracy

8

Parallelism and Performance

9

Further Comments

10

Example

10.1

Program Text

Program Text (m01cace.c)

10.2

Program Data

Program Data (m01cace.d)

10.3

Program Results

Program Results (m01cace.r)