Let's assume we have two data sets: products_table products {apple, orange, banana} and subproducts_table subproducts {apple, banana}.
In the SAS OPTMODEL procedure, we have define the set,
set<string> products_set;
read data products_table into
products_set = [products];
how do we define a subset of products_set which contains "subproducts {apple, banana}"?
Thank you for the help.