NAG Library Function Document

nag_conjugate_complex (c06gcc)

1: n – IntegerInput: On entry: $n$ , the number of data values.
Constraint: $n \geq 1$ .
2: y[n] – doubleInput/Output: On entry: $y [j]$ must contain the imaginary part of the $j$ th data value, for $0 \leq j \leq n - 1$ .

On exit: these values are negated.
3: fail – NagError *Input/Output: The NAG error argument (see Section 3.6 in the Essential Introduction).

6 Error Indicators and Warnings

NE_INT_ARG_LT: On entry, $n = ⟨value⟩$ .
Constraint: $n \geq 1$ .

7 Accuracy

Exact.

8 Parallelism and Performance

Not applicable.

9 Further Comments

The time taken is negligible.

10 Example

This program reads in a sequence of complex data values and prints their inverse discrete Fourier transform as computed by calling nag_conjugate_complex (c06gcc), followed by nag_fft_complex (c06ecc) and nag_conjugate_complex (c06gcc) again.

NAG Library Function Documentnag_conjugate_complex (c06gcc)

+− 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

10.1 Program Text

10.2 Program Data

10.3 Program Results

NAG Library Function Document

nag_conjugate_complex (c06gcc)