Decision Optimization

Originally posted by: KeerthivasanC

I have defined by variable this way:

TP1 = m.integer_var_dict(name = "TP1",keys=project)

Now, I want TP1 to only take the following values - [0,0.5,1,1.5,2]

But I am only able to do something like this in python:

for i in project:
    TP1[i].set_domain([0,1,2,3])

How can I configure TP1 to only take a set of values from a list which has continuous values?

Thanks and Regards

Hi,

let me start again with the bus and zoo story

https://www.linkedin.com/pulse/making-optimization-simple-python-alex-fleischer/

You could write

from docplex.cp.model import CpoModel

mdl = CpoModel(name='buses')

#now suppose we can book half a bus and not only complete buses

scale=2
scalenbbus40 = mdl.integer_var(0,1000,name='scalenbBus40')
scalenbbus30 = mdl.integer_var(0,1000,name='scalenbBus30')

nbbus40= scalenbbus40 / 2
nbbus30= scalenbbus30 / 2

 

mdl.add(nbbus40*40 + nbbus30*30 >= 300)
mdl.minimize(nbbus40*500 + nbbus30*400)

msol=mdl.solve()

print(msol[scalenbbus40]/scale," buses 40 seats")
print(msol[scalenbbus30]/scale," buses 30 seats")

which gives

7.5  buses 40 seats
0.0  buses 30 seats