Originally posted by: guvencdegirmenci

Hi,

I need to change the type of some variables from continuous to binary in my model. I know status = CPXchgctype (env, lp, cnt, indices, ctype); can be used for this but my model is quite big and I don't want to query indices and cnt of the variables etc. Is there a way to change type using variable names like (x1, x2)?
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Originally posted by: SystemAdmin

Assuming that you are using the callable library, I donot see a way around using the CPXchgctype() method for changing the variable types. If you have to change the types based only on the variable names, you could use the CPXgetcolname method (

status = CPXgetcolname (env, lp, cur_colname, cur_colnamestore,
                         cur_storespace, &surplus, 0,
                         cur_numcols-1);

), then create a indices array for the variables that you would like to change from continuous to binary, create a corresponding ctype array of 'B's and call the CPXchgctype() function.
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#DecisionOptimization

Originally posted by: guvencdegirmenci

Thanks for the response.
#CPLEXOptimizers
#DecisionOptimization