Line data    Source code

       1             : /* 
       2             :  * File:   ConjugateFunction.cpp
       3             :  * Author: Pantelis Sopasakis
       4             :  * 
       5             :  * Created on November 7, 2015, 3:15 AM
       6             :  * 
       7             :  * ForBES is free software: you can redistribute it and/or modify
       8             :  * it under the terms of the GNU Lesser General Public License as published by
       9             :  * the Free Software Foundation, either version 3 of the License, or
      10             :  * (at your option) any later version.
      11             :  *  
      12             :  * ForBES is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      15             :  * GNU Lesser General Public License for more details.
      16             :  * 
      17             :  * You should have received a copy of the GNU Lesser General Public License
      18             :  * along with ForBES. If not, see <http://www.gnu.org/licenses/>.
      19             :  */
      20             : 
      21             : #include "ConjugateFunction.h"
      22             : 
      23           8 : ConjugateFunction::ConjugateFunction(Function& funct) :
      24           8 : Function(), m_function(funct) {
      25           8 : }
      26             : 
      27          12 : ConjugateFunction::~ConjugateFunction() {
      28          12 : }
      29             : 
      30           1 : int ConjugateFunction::call(Matrix& x, double& f) {
      31           1 :     return m_function.callConj(x, f);
      32             : }
      33             : 
      34           1 : int ConjugateFunction::call(Matrix& x, double& f, Matrix& grad) {
      35           1 :     return m_function.callConj(x, f, grad);
      36             : }
      37             : 
      38           1 : int ConjugateFunction::callConj(Matrix& x, double& f_star, Matrix& grad) {
      39           1 :     return m_function.call(x, f_star, grad);
      40             : }
      41             : 
      42           1 : int ConjugateFunction::callConj(Matrix& x, double& f_star) {
      43           1 :     return m_function.call(x, f_star);
      44             : }
      45             : 
      46           1 : int ConjugateFunction::callProx(Matrix& x, double gamma, Matrix& prox) {
      47           1 :     double one_over_gamma = 1.0 / gamma;
      48           1 :     Matrix x_over_gamma = x;
      49           1 :     x_over_gamma *= one_over_gamma;
      50           1 :     int status = m_function.callProx(x_over_gamma, one_over_gamma, prox);
      51           1 :     prox *= gamma;
      52          10 :     for (size_t i = 0; i < x.getNrows(); i++) {
      53           9 :         prox.set(i, 0, x.get(i, 0) - prox.get(i, 0));
      54             :     }
      55           1 :     return status;
      56             : }
      57             : 
      58           0 : int ConjugateFunction::callProx(Matrix& x, double gamma, Matrix& prox, double& f_at_prox) {
      59           0 :     int status = callProx(x, gamma, prox);
      60           0 :     if (ForBESUtils::STATUS_OK != status) {
      61           0 :         return status;
      62             :     }
      63           0 :     return call(prox, f_at_prox);
      64             : }
      65             : 
      66           9 : FunctionOntologicalClass ConjugateFunction::category() {
      67           9 :     FunctionOntologicalClass meta("Conjugate");
      68          18 :     FunctionOntologicalClass orig_meta = m_function.category();
      69             :     
      70           9 :     if (orig_meta.is_quadratic()){
      71           3 :         FunctionOntologicalClass conj_quad_meta(FunctionOntologyRegistry::conj_quadratic().getName());
      72           3 :         meta.add_superclass(conj_quad_meta);
      73             :     }
      74             :     
      75           9 :     if (orig_meta.is_conjugate_quadratic()){
      76           3 :         FunctionOntologicalClass quad_meta(FunctionOntologyRegistry::quadratic().getName());
      77           3 :         meta.add_superclass(quad_meta);
      78             :     }
      79             :     
      80           9 :     meta.set_defines_f(orig_meta.defines_conjugate());
      81           9 :     meta.set_defines_grad(orig_meta.defines_conjugate_grad());
      82           9 :     meta.set_defines_conjugate(orig_meta.defines_f());
      83           9 :     meta.set_defines_conjugate_grad(orig_meta.defines_grad());
      84           9 :     meta.set_defines_prox(orig_meta.defines_prox());
      85          18 :     return meta;
      86           3 : }
      87             : 
      88             : 
      89             : 
      90             :