LeastSquaresFit.h

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//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#pragma once

#include "GeneralVectorPostprocessor.h"

class LeastSquaresFit : public GeneralVectorPostprocessor
{
public:
  static InputParameters validParams();

  LeastSquaresFit(const InputParameters & parameters);

  virtual void initialize() override;

  virtual void execute() override;

protected:
  VectorPostprocessorName _vpp_name;

  const unsigned int _order;

  const bool _truncate_order;

  const std::string _x_name;
  const std::string _y_name;

  const VectorPostprocessorValue & _x_values;
  const VectorPostprocessorValue & _y_values;

  const MooseEnum _output_type;

  unsigned int _num_samples;

  const Real _x_scale;
  const Real _x_shift;
  const Real _y_scale;
  const Real _y_shift;

  bool _have_sample_x_min;
  bool _have_sample_x_max;

  Real _sample_x_min;
  Real _sample_x_max;

  VectorPostprocessorValue * _sample_x;
  VectorPostprocessorValue * _sample_y;

  VectorPostprocessorValue * _coeffs;
};