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FFTDerivative.h
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FFTDerivative.h
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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2008 ISIS Rutherford Appleton Laboratory UKRI,
// NScD Oak Ridge National Laboratory, European Spallation Source,
// Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
#include "MantidAPI/Algorithm.h"
#include "MantidAPI/Workspace_fwd.h"
#include "MantidAlgorithms/DllConfig.h"
namespace Mantid {
namespace HistogramData {
class Histogram;
class HistogramX;
class HistogramY;
} // namespace HistogramData
namespace Algorithms {
/** Calculates derivatives of the spectra in a MatrixWorkspace using a Fast
Fourier Transform.
@author Roman Tolchenov
@date 21/02/2011
*/
class FFTDerivative : public Mantid::API::Algorithm {
public:
/// Algorithm's name
const std::string name() const override { return "FFTDerivative"; }
/// Summary of algorithms purpose
const std::string summary() const override {
return "Calculated derivatives of a spectra in the MatrixWorkspace using "
"Fast Fourier Transform (FFT).";
}
/// Algorithm's version
int version() const override { return (1); }
const std::vector<std::string> seeAlso() const override {
return {"ExtractFFTSpectrum", "FFT", "MaxEnt", "RealFFT", "SassenaFFT", "FFTSmooth"};
}
/// Algorithm's category for identification
const std::string category() const override { return "Arithmetic\\FFT"; }
private:
/// Initialisation code
void init() override;
/// Execution code
void exec() override;
void execComplexFFT();
void symmetriseSpectrum(const HistogramData::Histogram &in, HistogramData::HistogramX &symX,
HistogramData::HistogramY &symY, const size_t nx, const size_t ny);
void multiplyTransform(HistogramData::HistogramX &nu, HistogramData::HistogramY &re, HistogramData::HistogramY &im);
};
} // namespace Algorithms
} // namespace Mantid