topic Re: syntax question in Mathematical Optimization, Discrete-Event Simulation, and OR

syntax question

Santha — Thu, 12 Mar 2020 16:45:00 GMT

Hi Rob

Getting a syntax issue on Constraint "LSP_DC_Link1". What am I missing?

con LSP_DC_Link1{p in Ports, t in Transit,c in LSP: c not in {'ZIMU','ONEY'}, d in DC}:
ContainersfromPortstoLSPtoDC[p,t,c,d] <= BigM * IsLSPDC[c,d];

Re: syntax question

RobPratt — Thu, 12 Mar 2020 16:47:07 GMT

Here are two correct ways:

con LSP_DC_Link1{p in Ports, t in Transit, c in LSP, d in DC: c not in {'ZIMU','ONEY'}}:
   ContainersfromPortstoLSPtoDC[p,t,c,d] <= BigM * IsLSPDC[c,d];

con LSP_DC_Link1{p in Ports, t in Transit, c in LSP diff {'ZIMU','ONEY'}, d in DC}:
   ContainersfromPortstoLSPtoDC[p,t,c,d] <= BigM * IsLSPDC[c,d];

Re: syntax question

Santha — Thu, 12 Mar 2020 16:51:07 GMT

aah. so i get the syntax now. thanks rob as always