Decision Optimization

Hello, 

I have a cp problem where i use a  integer_var_dict. I would like to set a starting point of that variable. I'm new to this and don't know if this is a lack of python or cplex knowledge. 

Basicly:

import docplex.cp.model as cp 

from docplex.cp.model import CpoModelmdl = CpoModel(name='buses')nbbus40 = mdl.integer_var(0,1000,name='nbBus40')nbbus30 = mdl.integer_var(0,1000,name='nbBus30')mdl.add(nbbus40*40 + nbbus30*30 >= 300)mdl.minimize(nbbus40*500 + nbbus30*400)sol=mdl.create_empty_solution()sol[nbbus40]=8sol[nbbus30]=0mdl.set_starting_point(sol)msol=mdl.solve()print(msol[nbbus40]," buses 40 seats")print(msol[nbbus30]," buses 30 seats") ​

! -------------------------------------------------- CP Optimizer 12.10.0.0 -- ! Minimization problem - 2 variables, 1 constraint ! Using starting point solution ! Initial process time : 0.00s (0.00s extraction + 0.00s propagation) !  . Log search space  : 19.9 (before), 19.9 (after) !  . Memory usage      : 267.0 kB (before), 267.0 kB (after) ! Using parallel search with 12 workers. ! ---------------------------------------------------------------------------- !          Best Branches  Non-fixed    W       Branch decision                        0          2                 - + New bound is 0 ! Starting point is complete and consistent with constraints. *          4000        0  0.01s        1      (gap is 100.0%)            4000        0          2    1            - + New bound is 3800 (gap is 5.00%) *          3800        0  0.01s        1      (gap is 0.00%) ! ---------------------------------------------------------------------------- ! Search completed, 2 solutions found. ! Best objective         : 3800 (optimal - effective tol. is 0) ! Best bound             : 3800 ! ---------------------------------------------------------------------------- ! Number of branches     : 232 ! Number of fails        : 188 ! Total memory usage     : 5.3 MB (5.3 MB CP Optimizer + 0.0 MB Concert) ! Time spent in solve    : 0.01s (0.01s engine + 0.00s extraction) ! Search speed (br. / s) : 21090.9 ! ----------------------------------------------------------------------------6  buses 40 seats2  buses 30 seats​

Hello, 

I have a cp problem where i use a  integer_var_dict. I would like to set a starting point of that variable. I'm new to this and don't know if this is a lack of python or cplex knowledge. 

Basicly:

import docplex.cp.model as cp 

from docplex.cp.model import CpoModelmdl = CpoModel(name='buses')nbbus40 = mdl.integer_var(0,1000,name='nbBus40')nbbus30 = mdl.integer_var(0,1000,name='nbBus30')mdl.add(nbbus40*40 + nbbus30*30 >= 300)mdl.minimize(nbbus40*500 + nbbus30*400)sol=mdl.create_empty_solution()sol[nbbus40]=8sol[nbbus30]=0mdl.set_starting_point(sol)msol=mdl.solve()print(msol[nbbus40]," buses 40 seats")print(msol[nbbus30]," buses 30 seats") ​

! -------------------------------------------------- CP Optimizer 12.10.0.0 -- ! Minimization problem - 2 variables, 1 constraint ! Using starting point solution ! Initial process time : 0.00s (0.00s extraction + 0.00s propagation) !  . Log search space  : 19.9 (before), 19.9 (after) !  . Memory usage      : 267.0 kB (before), 267.0 kB (after) ! Using parallel search with 12 workers. ! ---------------------------------------------------------------------------- !          Best Branches  Non-fixed    W       Branch decision                        0          2                 - + New bound is 0 ! Starting point is complete and consistent with constraints. *          4000        0  0.01s        1      (gap is 100.0%)            4000        0          2    1            - + New bound is 3800 (gap is 5.00%) *          3800        0  0.01s        1      (gap is 0.00%) ! ---------------------------------------------------------------------------- ! Search completed, 2 solutions found. ! Best objective         : 3800 (optimal - effective tol. is 0) ! Best bound             : 3800 ! ---------------------------------------------------------------------------- ! Number of branches     : 232 ! Number of fails        : 188 ! Total memory usage     : 5.3 MB (5.3 MB CP Optimizer + 0.0 MB Concert) ! Time spent in solve    : 0.01s (0.01s engine + 0.00s extraction) ! Search speed (br. / s) : 21090.9 ! ----------------------------------------------------------------------------6  buses 40 seats2  buses 30 seats​

Hello, 

I have a cp problem where i use a  integer_var_dict. I would like to set a starting point of that variable. I'm new to this and don't know if this is a lack of python or cplex knowledge. 

Basicly:

import docplex.cp.model as cp 

which python tool have you tried ?

You may also try

from docplex.cp.model import CpoModelmdl = CpoModel(name='buses')nbbus40 = mdl.integer_var(0,1000,name='nbBus40')nbbus30 = mdl.integer_var(0,1000,name='nbBus30')mdl.add(nbbus40*40 + nbbus30*30 >= 300)mdl.minimize(nbbus40*500 + nbbus30*400)sol=mdl.create_empty_solution()sol[nbbus40]=8sol[nbbus30]=0mdl.set_starting_point(sol)msol=mdl.solve(LogPeriod=1)print(msol.get_solver_log())print(msol[nbbus40]," buses 40 seats")print(msol[nbbus30]," buses 30 seats")​

from docplex.cp.model import CpoModelmdl = CpoModel(name='buses')nbbus40 = mdl.integer_var(0,1000,name='nbBus40')nbbus30 = mdl.integer_var(0,1000,name='nbBus30')mdl.add(nbbus40*40 + nbbus30*30 >= 300)mdl.minimize(nbbus40*500 + nbbus30*400)sol=mdl.create_empty_solution()sol[nbbus40]=8sol[nbbus30]=0mdl.set_starting_point(sol)msol=mdl.solve()print(msol[nbbus40]," buses 40 seats")print(msol[nbbus30]," buses 30 seats") ​

! -------------------------------------------------- CP Optimizer 12.10.0.0 -- ! Minimization problem - 2 variables, 1 constraint ! Using starting point solution ! Initial process time : 0.00s (0.00s extraction + 0.00s propagation) !  . Log search space  : 19.9 (before), 19.9 (after) !  . Memory usage      : 267.0 kB (before), 267.0 kB (after) ! Using parallel search with 12 workers. ! ---------------------------------------------------------------------------- !          Best Branches  Non-fixed    W       Branch decision                        0          2                 - + New bound is 0 ! Starting point is complete and consistent with constraints. *          4000        0  0.01s        1      (gap is 100.0%)            4000        0          2    1            - + New bound is 3800 (gap is 5.00%) *          3800        0  0.01s        1      (gap is 0.00%) ! ---------------------------------------------------------------------------- ! Search completed, 2 solutions found. ! Best objective         : 3800 (optimal - effective tol. is 0) ! Best bound             : 3800 ! ---------------------------------------------------------------------------- ! Number of branches     : 232 ! Number of fails        : 188 ! Total memory usage     : 5.3 MB (5.3 MB CP Optimizer + 0.0 MB Concert) ! Time spent in solve    : 0.01s (0.01s engine + 0.00s extraction) ! Search speed (br. / s) : 21090.9 ! ----------------------------------------------------------------------------6  buses 40 seats2  buses 30 seats​

Hello, 

I have a cp problem where i use a  integer_var_dict. I would like to set a starting point of that variable. I'm new to this and don't know if this is a lack of python or cplex knowledge. 

Basicly:

import docplex.cp.model as cp