NAG FL Interface
e04npf (qpconvex2_​sparse_​init)

1 Purpose

2 Specification

3 Description

4 References

5 Arguments

1: $\mathbf{cw}\left(\mathbf{lencw}\right)$ – Character(8) array Communication Array

2: $\mathbf{lencw}$ – Integer Input

On entry: the dimension of the array cw as declared in the (sub)program from which e04npf is called.

Constraint: $\mathbf{lencw}\ge 600$, see routine e04nqf.

3: $\mathbf{iw}\left(\mathbf{leniw}\right)$ – Integer array Communication Array

4: $\mathbf{leniw}$ – Integer Input

On entry: the dimension of the array iw as declared in the (sub)program from which e04npf is called.

Constraint: $\mathbf{leniw}\ge 600$, see routine e04nqf.

5: $\mathbf{rw}\left(\mathbf{lenrw}\right)$ – Real (Kind=nag_wp) array Communication Array

6: $\mathbf{lenrw}$ – Integer Input

On entry: the dimension of the array rw as declared in the (sub)program from which e04npf is called.

Constraint: $\mathbf{lenrw}\ge 600$, see routine e04nqf.

7: $\mathbf{ifail}$ – Integer Input/Output

On entry: ifail must be set to $0$, $-1\text{ or }1$. If you are unfamiliar with this argument you should refer to Section 4 in the Introduction to the NAG Library FL Interface for details.

For environments where it might be inappropriate to halt program execution when an error is detected, the value $-1\text{ or }1$ is recommended. If the output of error messages is undesirable, then the value $1$ is recommended. Otherwise, if you are not familiar with this argument, the recommended value is $0$. When the value $-\mathbf{1}\text{ or }\mathbf{1}$ is used it is essential to test the value of ifail on exit.

On exit: $\mathbf{ifail}=\mathbf{0}$ unless the routine detects an error or a warning has been flagged (see Section 6).

6 Error Indicators and Warnings

$\mathbf{ifail}=1$

On entry, $\mathbf{lencw}=〈\mathit{\text{value}}〉$.
Constraint: $\mathbf{lencw}\ge 600$.

On entry, $\mathbf{leniw}=〈\mathit{\text{value}}〉$.
Constraint: $\mathbf{leniw}\ge 600$.

On entry, $\mathbf{lenrw}=〈\mathit{\text{value}}〉$.
Constraint: $\mathbf{lenrw}\ge 600$.

$\mathbf{ifail}=-99$

An unexpected error has been triggered by this routine. Please contact NAG.

See Section 7 in the Introduction to the NAG Library FL Interface for further information.

$\mathbf{ifail}=-399$

Your licence key may have expired or may not have been installed correctly.

See Section 8 in the Introduction to the NAG Library FL Interface for further information.

$\mathbf{ifail}=-999$

Dynamic memory allocation failed.

See Section 9 in the Introduction to the NAG Library FL Interface for further information.

7 Accuracy

8 Parallelism and Performance

9 Further Comments

10 Example