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statistics.hh
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rTAMAAS tamaas
statistics.hh
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/*
* SPDX-License-Indentifier: AGPL-3.0-or-later
*
* Copyright (©) 2016-2023 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
* Copyright (©) 2020-2023 Lucas Frérot
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef STATISTICS_HH
#define STATISTICS_HH
/* -------------------------------------------------------------------------- */
#include "fft_engine.hh"
#include "grid.hh"
/* -------------------------------------------------------------------------- */
namespace
tamaas
{
/* -------------------------------------------------------------------------- */
/**
* @brief Suitcase class for all statistics related functions
*/
template
<
UInt
dim
>
struct
Statistics
{
/// Compute hrms
static
Real
computeRMSHeights
(
Grid
<
Real
,
dim
>&
surface
);
/// Compute hrms' in fourier space
static
Real
computeSpectralRMSSlope
(
Grid
<
Real
,
dim
>&
surface
);
/// Compute hrms' with finite differences
static
Real
computeFDRMSSlope
(
Grid
<
Real
,
dim
>&
surface
);
/// Compute PSD of surface
static
GridHermitian
<
Real
,
dim
>
computePowerSpectrum
(
Grid
<
Real
,
dim
>&
surface
);
/// Compute autocorrelation
static
Grid
<
Real
,
dim
>
computeAutocorrelation
(
Grid
<
Real
,
dim
>&
surface
);
/// Compute spectral moments
static
std
::
vector
<
Real
>
computeMoments
(
Grid
<
Real
,
dim
>&
surface
);
/// Compute (corrected) contact area fraction
static
Real
contact
(
const
Grid
<
Real
,
dim
>&
tractions
,
UInt
perimeter
=
0
);
/// Compute the area scaling factor of a periodic graph
static
Real
graphArea
(
const
Grid
<
Real
,
dim
>&
displacement
);
using
PVector
=
VectorProxy
<
Real
,
dim
>
;
private
:
template
<
class
T
>
static
Real
rmsSlopesFromPSD
(
const
GridHermitian
<
Real
,
dim
>&
psd
,
const
Grid
<
T
,
dim
>&
diff
);
};
/* -------------------------------------------------------------------------- */
}
// namespace tamaas
#endif
// STATISTICS_HH
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