Obtain and display only nonzero values of the variables

[Cacharmday]

Hi, 

After many hours of struggling i obtained the right output for my MIP problem. 

Now i want to process my results. I want to obtain (and display) only the non-zero values. 

Is there any possible way?

Something like 

model.x[model.x>=0]               where x is the decision variable.

or somthing like

model.x.pprint(option = PositiveIntegers)

Please help out:D

I want to make an schedule of the non-zero values. 

Thanks in advance, 

C.Day

[jose santiago rodriguez]

Hi,

tol = 1e-4
for k in model.x.keys():

    if abs(model.x[k].value)>tol:

        print model.x[k].cname(), model.x[k].value

Santiago   

[Cacharmday]

Op dinsdag 28 juni 2016 19:15:23 UTC+2 schreef jose santiago rodriguez:

That helped. 

Thanks!
Do you know if there is any documentation about the operation which you could do on the pyomo variables like cname(), value an pprint()?

C.Day

[jose santiago rodriguez]

Glad it help. 

You can go to pyomo.org and take a look at the documentation. If you do not find what you need in there you can always go to the source code and take a look at the implementation of the class you are using. For instance, you may want to have a look at var.py

"YourPython"/src/pyomo/pyomo/core/base/var.py

If you do not know where is your source code you can open a python shell and type

import pyomo

pyomo.__path__

That will tell you were is you pyomo package and you can explore the code to find what you need.

Santiago