Hello,
I am trying to write a constraint like if product is a then take the type_a column for constraint else take type_b column for product b.
Is it posiible to write a constraint like
con product_limit: if product='a' then something <type_a[i]
else something< type_b;
data commodity;
input product type_a type_b;
datalines;
a 20 25
a 50 15
a 25 10
b 30 15
b 25 20
b 30 30
;
Thankss!