NAG Library Routine Document

f06thf  (zmload)

1

Purpose

2

Specification

3

Description

4

References

5

Arguments

1:     $\mathbf{matrix}$ – Character(1)Input

On entry: the matrix type.

$\mathbf{matrix}=\text{'G'}$

General matrix.

$\mathbf{matrix}=\text{'U'}$

Upper trapezoidal matrix (upper triangular if $m=n$).

$\mathbf{matrix}=\text{'L'}$

Lower trapezoidal matrix (lower triangular if $m=n$).

Constraint: $\mathbf{matrix}=\text{'G'}$, $\text{'U'}$ or $\text{'L'}$.

2:     $\mathbf{m}$ – IntegerInput

On entry: $m$, the number of rows of the matrix $A$.

Constraint: $\mathbf{m}\ge 0$.

3:     $\mathbf{n}$ – IntegerInput

On entry: $n$, the number of columns of the matrix $A$.

Constraint: $\mathbf{n}\ge 0$.

4:     $\mathbf{con}$ – Complex (Kind=nag_wp)Input

On entry: the value to be assigned to the off-diagonal elements of $A$.

5:     $\mathbf{diag}$ – Complex (Kind=nag_wp)Input

On entry: the value to be assigned to the diagonal elements of $A$.

6:     $\mathbf{a}\left(\mathbf{lda},*\right)$ – Complex (Kind=nag_wp) arrayOutput

Note: the second dimension of the array a must be at least $\mathbf{n}$.

On exit: the $m$ by $n$ general or trapezoidal matrix $A$.

• If $\mathbf{matrix}=\text{'U'}$, $A$ is upper trapezoidal and the elements of the array below the diagonal are not referenced.
• If $\mathbf{matrix}=\text{'L'}$, $A$ is lower trapezoidal and the elements of the array above the diagonal are not referenced.

7:     $\mathbf{lda}$ – IntegerInput

On entry: the first dimension of the array a as declared in the (sub)program from which f06thf is called.

Constraint: $\mathbf{lda}\ge \max \left(1,\mathbf{m}\right)$.

6

Error Indicators and Warnings

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Accuracy

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Parallelism and Performance

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Further Comments

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Example