BookmarkSubscribeRSS Feed
🔒 This topic is solved and locked. Need further help from the community? Please sign in and ask a new question.
V12DBS
Calcite | Level 5

Hello,

I have a constraint that needs a conditional statement and not sure what are the syntax to handle in proc optmodel.

for all "i" in PickUpNode table, if "i" = Cary, NC then

sum{<s,d> in RouteTable: s=i} 1 * MS[s,d] = 1;

else

sum{<s,d> in RouteTable: s=i} 1 * MS[s,d] <= 1;

Thank You,

BG

1 ACCEPTED SOLUTION

Accepted Solutions
RobPratt
SAS Super FREQ

Assuming MS >= 0, here are three ways, in increasing order of compactness:

   con Mycon {i in PickUpNode}:

      (if i = 'Cary, NC' then 1 else 0)

   <= sum{<s,d> in RouteTable: s=i} MS[s,d]

   <= 1;

   con Mycon {i in PickUpNode}:

      (if i = 'Cary, NC' then 1 else 0)

   <= sum{<(i),d> in RouteTable} MS[i,d]

   <= 1;

   con Mycon {i in PickUpNode}:

      (i = 'Cary, NC')

   <= sum{<(i),d> in RouteTable} MS[i,d]

   <= 1;

You might find these examples useful:

SAS/OR(R) 13.2 User's Guide: Mathematical Programming Examples

View solution in original post

2 REPLIES 2
RobPratt
SAS Super FREQ

Assuming MS >= 0, here are three ways, in increasing order of compactness:

   con Mycon {i in PickUpNode}:

      (if i = 'Cary, NC' then 1 else 0)

   <= sum{<s,d> in RouteTable: s=i} MS[s,d]

   <= 1;

   con Mycon {i in PickUpNode}:

      (if i = 'Cary, NC' then 1 else 0)

   <= sum{<(i),d> in RouteTable} MS[i,d]

   <= 1;

   con Mycon {i in PickUpNode}:

      (i = 'Cary, NC')

   <= sum{<(i),d> in RouteTable} MS[i,d]

   <= 1;

You might find these examples useful:

SAS/OR(R) 13.2 User's Guide: Mathematical Programming Examples

V12DBS
Calcite | Level 5

Hi Rob,

Thanks so much for the help. I truly appreciate it. The constraint is working beautifully.

Regards,

BG

SAS INNOVATE 2024

Innovate_SAS_Blue.png

Registration is open! SAS is returning to Vegas for an AI and analytics experience like no other! Whether you're an executive, manager, end user or SAS partner, SAS Innovate is designed for everyone on your team. Register for just $495 by 12/31/2023.

If you are interested in speaking, there is still time to submit a session idea. More details are posted on the website. 

Register now!

Multiple Linear Regression in SAS

Learn how to run multiple linear regression models with and without interactions, presented by SAS user Alex Chaplin.

Find more tutorials on the SAS Users YouTube channel.

Discussion stats
  • 2 replies
  • 960 views
  • 0 likes
  • 2 in conversation