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root/group/trunk/OOPSE/libmdtools/Minimizer1D.cpp
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Comparing trunk/OOPSE/libmdtools/Minimizer1D.cpp (file contents):
Revision 1014 by tim, Tue Feb 3 20:43:08 2004 UTC vs.
Revision 1015 by tim, Tue Feb 3 22:54:52 2004 UTC

# Line 1 | Line 1
1   #include "Minimizer1D.hpp"
2   #include "math.h"
3  
4 – //----------------------------------------------------------------------------//
5 – void Minimizer1D::Minimize(vector<double>& direction, double left, double right){
6 –  setDirection(direction);
7 –  setRange(left,right);
8 –  minimize();
9 – }
10 –
11 – //----------------------------------------------------------------------------//
4   GoldenSectionMinimizer::GoldenSectionMinimizer(NLModel* nlp)
5                                 :Minimizer1D(nlp){
6    setName("GoldenSection");
# Line 27 | Line 19 | void GoldenSectionMinimizer::minimize(){
19  
20    const double goldenRatio = 0.618034;
21    
22 <  currentX =  model->getX();
22 >  tempX = currentX =  model->getX();
23  
24    alpha = leftVar + (1 - goldenRatio) * (rightVar  - leftVar);
25    beta = leftVar + goldenRatio * (rightVar - leftVar);
26  
27 <  tempX = currentX + direction * alpha;
27 >  for (int i = 0; i < tempX.size(); i ++)
28 >    tempX[i] = currentX[i] + direction[i] * alpha;
29 >
30    fAlpha = model->calcF(tempX);
31  
32 <  tempX = currentX + direction * beta;
32 >  for (int i = 0; i < tempX.size(); i ++)
33 >    tempX[i] = currentX[i] + direction[i] * beta;
34 >
35    fBeta = model->calcF(tempX);
36  
37    for(currentIter = 0; currentIter < maxIteration; currentIter++){
# Line 50 | Line 46 | void GoldenSectionMinimizer::minimize(){
46        alpha = beta;
47        beta =  leftVar + goldenRatio * (rightVar - leftVar);
48  
49 <      tempX = currentX + beta * direction;
49 >      for (int i = 0; i < tempX.size(); i ++)
50 >        tempX[i] = currentX[i] + direction[i] * beta;
51  
52        prevMinVar = minVar;
53        fPrevMinVar = fMinVar;
# Line 64 | Line 61 | void GoldenSectionMinimizer::minimize(){
61        beta = alpha;
62        alpha = leftVar + (1 - goldenRatio) * (rightVar  - leftVar);
63  
64 <      tempX = currentX + alpha * direction;
64 >      for (int i = 0; i < tempX.size(); i ++)
65 >        tempX[i] = currentX[i] + direction[i] * alpha;
66  
67        prevMinVar = minVar;
68        fPrevMinVar = fMinVar;
# Line 107 | Line 105 | void BrentMinimizer::minimize(){
105  
106    currentX = tempX = model->getX();
107  
108 <  tempX = currentX + leftVar * direction;
108 >  for (int i = 0; i < tempX.size(); i ++)
109 >    tempX[i] = currentX[i] + direction[i] * leftVar;
110 >  
111    fLeftVar = model->calcF(tempX);
112 +
113 +  for (int i = 0; i < tempX.size(); i ++)
114 +    tempX[i] = currentX[i] + direction[i] * rightVar;  
115    
113 –  tempX = currentX + rightVar * direction;
116    fRightVar = model->calcF(tempX);
117  
118    if(fRightVar < fLeftVar) {
# Line 165 | Line 167 | void BrentMinimizer::minimize(){
167  
168       u = fabs(d) >= stepTol ? minVar + d : minVar + copysign(d, stepTol);
169  
170 <     tempX = currentX + u * direction;
170 >     for (int i = 0; i < tempX.size(); i ++)
171 >       tempX[i] = currentX[i] + direction[i] * u;  
172 >    
173       fu = model->calcF();  
174  
175       if(fu <= fMinVar){

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