About Model.getVars in Gurobi

[Yongjia Song]

Sorry to bother all,

I would like to know how to use the function Model.getVars in Gurobi so that I can get the variables with specific names that I have set up when I add variables with names.

For example,

binvars = []
    for i in range(Last):
        newvar = m.addVar(0.0,1.0,0,GRB.BINARY,"binvar"+str(i))
        binvars += [newvar]

And when I use Callback, how can I get the variables with name "binvar"?

Thanks,

--
Sincerely:
Song Yongjia（宋永佳）

Department of Industrial and Systems Engineering
College of Engineering, University of Wisconsin-Madison
3241 Mechanical Engineering Building
1513 University Avenue, Madison, WI 53706

[Ed Rothberg]

Take a look at the first message in this group ('A bonus example').
The example code in that message does almost exactly what you are
trying to do.

Ed

[Yongjia Song]

Thanks for the example, but what if I have several kinds of integer variables?

For example, I have named integer variables x1,x2,...,xn a name "K[i],
i=1,2,...,n", and integer variables y1,y2,...,yn a name "P[i],
i=1,2,...,n", so how can I extract them seperately because I may have
different heuristic on them.

Thanks a lot!

Best,

[Ed Rothberg]

This sounds like a Python programming question.

The following...

[x for x in model.getVars() if x.VarName.find('binvar') != -1]

...gives you a list of all variables whose names contain the string
'binvar'.

[Yongjia Song]

OK, thanks, I've got it.

Best,

On 1/18/10, Ed Rothberg <roth...@gurobi.com> wrote:
>

[Akul Bansal]

This may not be relevant now but I am posting it anyways so that it may be helpful if someone visits this later. You can access variable by their names using the function mentioned here http://www.gurobi.com/documentation/8.0/refman/py_model_getvarbyname.html