NAG CL Interface
c06gsc (withdraw_​convert_​herm2complex_​sep)

1 Purpose

2 Specification

3 Description

4 References

5 Arguments

1: $\mathbf{m}$ – Integer Input

On entry: the number of Hermitian sequences, $m$, to be converted into complex form.

Constraint: $\mathbf{m}\ge 1$.

2: $\mathbf{n}$ – Integer Input

On entry: the number of data values, $n$, in each sequence.

Constraint: $\mathbf{n}\ge 1$.

3: $\mathbf{x}\left[\mathbf{m}\times \mathbf{n}\right]$ – const double Input

On entry: the $m$ data sequences must be stored in x consecutively. If the $n$ data values $z_j^p$ are written as $x_j^p+{iy}_j^p$, $p=1,2,\dots ,m$, then for $0\le j\le n/2$, $x_j^p$ is contained in $\mathbf{x}\left[(p-1)\times n+j\right]$, and for $1\le j\le (n-1)/2$, $y_j^p$ is contained in $\mathbf{x}\left[(p-1)\times n+n-j\right]$.

4: $\mathbf{u}\left[\mathbf{m}\times \mathbf{n}\right]$ – double Output

5: $\mathbf{v}\left[\mathbf{m}\times \mathbf{n}\right]$ – double Output

On exit: the real and imaginary parts of the $m$ sequences of length $n$ are stored consecutively in u and v respectively. If the real parts of the $p$th sequence are denoted by $x_{\mathit{j}}^p$, for $\mathit{j}=0,1,\dots ,n-1$, then the $mn$ elements of the array u contain the values

$$x_0^1,x_1^1,\dots ,x_{n-1}^1,x_0^2,x_1^2,\dots ,x_{n-1}^2,\dots ,x_0^m,x_1^m,\dots ,x_{n-1}^m\text{.}$$

The imaginary parts must be ordered similarly in v.

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

The NAG error argument (see Section 7 in the Introduction to the NAG Library CL Interface).

6 Error Indicators and Warnings

NE_INT_ARG_LT

On entry, $\mathbf{m}=⟨\mathit{\text{value}}⟩$.
Constraint: $\mathbf{m}\ge 1$.

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

10.2 Program Data

10.3 Program Results