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// $Id$ |
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/* |
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Copyright (C) 2004, 2005, 2006 Jari Häkkinen, Peter Johansson |
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Copyright (C) 2007 Peter Johansson |
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Copyright (C) 2008 Jari Häkkinen, Peter Johansson |
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Copyright (C) 2009 Jari Häkkinen |
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Copyright (C) 2012, 2022 Peter Johansson |
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This file is part of the yat library, http://dev.thep.lu.se/yat |
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The yat library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License as |
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published by the Free Software Foundation; either version 3 of the |
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License, or (at your option) any later version. |
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|
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The yat library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with yat. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#include <config.h> |
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#include "GSLInterpolation.h" |
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#include "yat/utility/Exception.h" |
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#include "yat/utility/VectorBase.h" |
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|
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#include <cassert> |
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#include <sstream> |
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|
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namespace theplu { |
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namespace yat { |
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namespace regression { |
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|
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|
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GSLInterpolation::GSLInterpolation(const gsl_interp_type* interpolator_type, |
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const utility::VectorBase& x, |
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const utility::VectorBase& y) |
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: evaluation_(0.0) |
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{ |
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assert(x.size()==y.size()); |
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size_t size=x.size(); |
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x_.reset(new double[size]); |
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std::copy(x.begin(), x.end(), x_.get()); |
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y_.reset(new double[size]); |
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std::copy(y.begin(), y.end(), y_.get()); |
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interpolator_ = gsl_interp_alloc(interpolator_type, size); |
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if (int status=gsl_interp_init(interpolator_, x_.get(), y_.get(), size)) { |
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std::stringstream ss; |
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ss << "GSLInterpolation::GSLInterpolation error code " << status; |
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// clean up |
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gsl_interp_free(interpolator_); |
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throw utility::GSL_error(ss.str()); |
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} |
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accelerator_ = gsl_interp_accel_alloc(); |
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} |
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|
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|
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GSLInterpolation::~GSLInterpolation(void) |
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{ |
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gsl_interp_accel_free(accelerator_); |
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gsl_interp_free(interpolator_); |
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} |
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|
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|
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double GSLInterpolation::evaluate(double x) |
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{ |
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if (int status=gsl_interp_eval_e(interpolator_, x_.get(), y_.get(), x, |
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accelerator_, &evaluation_)) { |
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std::stringstream ss; |
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ss << "GSLInterpolation::evaluate for argument " << x << " fails.\n" |
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<< " Error code " << status; |
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throw utility::GSL_error(ss.str()); |
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} |
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return evaluation_; |
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} |
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|
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double GSLInterpolation::evaluate_derivative(double x) |
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{ |
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if (int status=gsl_interp_eval_deriv_e(interpolator_, x_.get(), y_.get(), |
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x, accelerator_, &evaluation_)) { |
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std::stringstream ss; |
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ss << "GSLInterpolation::evaluate_derivative for argument " << x |
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<< " fails.\n Error code " << status; |
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throw utility::GSL_error(ss.str()); |
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} |
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return evaluation_; |
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} |
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double GSLInterpolation::evaluate_derivative2(double x) |
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{ |
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if (int status=gsl_interp_eval_deriv2_e(interpolator_, x_.get(), y_.get(), |
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x, accelerator_, &evaluation_)) { |
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std::stringstream ss; |
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ss << "GSLInterpolation::evaluate_derivative2 for argument " << x |
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<< " fails.\n Error code " << status; |
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throw utility::GSL_error(ss.str()); |
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} |
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return evaluation_; |
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} |
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|
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double GSLInterpolation::evaluate_integral(double a, double b) |
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{ |
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if (int status=gsl_interp_eval_integ_e(interpolator_, x_.get(), y_.get(), |
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a, b, accelerator_, &evaluation_)) { |
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std::stringstream ss; |
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ss << "GSLInterpolation::evaluate_integral for arguments a=" << a |
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<< " and b=" << b << " fails.\n Error code " << status; |
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throw utility::GSL_error(ss.str()); |
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} |
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return evaluation_; |
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} |
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|
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|
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double GSLInterpolation::evaluation(void) const |
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{ |
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return evaluation_; |
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} |
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|
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|
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unsigned int GSLInterpolation::min_size(void) const |
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{ |
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return gsl_interp_min_size(interpolator_); |
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} |
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|
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}}} // of namespaces regression, yat, and theplu |