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

Hi All,

 

I used SAS/OR proc optmodel before in order to find a solution. But that's for a single number.

Now I need to randomly pick 100 records from 1000 records. There is another constaint, the sum of these 100 records must be a ceterain number (K).

 

So the constaints are: sum of the total number of records is 100 and the sum of records is K.

 

Where can I start? I look up some of examples but I cannot find anything similar.

 

Thanks

 

1 ACCEPTED SOLUTION

Accepted Solutions
RobPratt
SAS Super FREQ

I think you want to declare a binary variable for each record and then declare your two constraints, like this:

set RECORDS;
num a {RECORDS};
read data indata into RECORDS=[record] a;
var X {RECORDS} binary;
con NumberRecords:
   sum {r in RECORDS} X[r] = 100;
con SumRecords:
   sum {r in RECORDS} a[r]*X[r] = k;

View solution in original post

1 REPLY 1
RobPratt
SAS Super FREQ

I think you want to declare a binary variable for each record and then declare your two constraints, like this:

set RECORDS;
num a {RECORDS};
read data indata into RECORDS=[record] a;
var X {RECORDS} binary;
con NumberRecords:
   sum {r in RECORDS} X[r] = 100;
con SumRecords:
   sum {r in RECORDS} a[r]*X[r] = k;

sas-innovate-2024.png

📢

ANNOUNCEMENT

The early bird rate has been extended! Register by March 18 for just $695 - $100 off the standard rate.

 

Check out the agenda and get ready for a jam-packed event featuring workshops, super demos, breakout sessions, roundtables, inspiring keynotes and incredible networking events. 

 

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
  • 1 reply
  • 887 views
  • 1 like
  • 2 in conversation