I want to define three equations for three-time steps.
For the first hour, I can write the following:
p(s,h) $(ord(h) eq 1)…
The last hour will be the following:
p(s,h) $(ord(h) eq card(h))…
I am trying to write equations for the hours in between something like this but can’t get the syntax right.
p(s,h) $(ord(h) gt 1 & ord(h) lt card(h))…
I would appreciate any help on this.
Hi
Yould define a parameter as follows:
alias(h,ah);
parameter hnr(h) Hour ord;
hnr(h) = ord(h);
p(s,h,ah)$(ord(h) eq hnr(h))..
Cheers
Renger
Suppose that you are hired as a decision maker for a charity organization called “Help!”. This year the
organisation is planning to distribute support packages including basic needs (bottles of water, bread, canned
food etc.) to people in need in their neighbourhood. Some volunteers collected data from around and found
that there are 24 houses which are suitable for this support and gave you the coordinates for those houses.
Houses 1 2 3 4 5 6 7 8 9 10 11 12
x 6 14 14 4 3 10 20 7 12 5 16 6
y 19 7 4 6 13 12 8 17 12 11 19 6
Houses 13 14 15 16 17 18 19 20 21 22 23 24
x 11 14 18 20 11 3 3 6 17 6 17 5
y 16 16 8 12 2 2 11 16 19 3 12 10
Table 1: Coordinates of the houses.
According to the given information try to make decisions for the following problems
Could you help me please 
have a healtyh days
I tried the proposed way but I think I didn’t quite understand the way you proposed to solve this. Let’s say,
set h /1*10/;
p(s,h) $(ord(h) eq 1)..
p(s,h) $(ord(h) eq card(h))..
How do I write the code using the method you suggested for hours 2 to 9. I really appreciate your help on this.
Hi
Sorry, my mistake. Here a solution: you split the equation in three parts and use the conditions on those parts
p(s,h).. A(s,h) =E=
12$(ord(h) = 1 )$(ord(h) eq 1) +
10$(ord(h) > 1 and ord(h) < card(h));
8$(ord(h) = card(h);
THis will result in A(s,h) begin 12 in the first hour, 10 in the in-between hours, and 8 in the last hour.
I hope this helps
Cheers
Renger