Reply-to: gamsworld@googlegroups.com
thank you so much for your reply. It works.
now the condition changes:
k=k+1;
if a variable’s value fea.l<10e-5, i need to record t(v), the discrete set index when fea.l<10e-5
s(v)=not t(v)
until k=10;
how can I do?
I think my method below is incorrect.
t(v)=yes$((fea.l<10e-5)and(ord(v)=k));
s(v)=yes$((not t(v))and(ord(v)=k))
在 2014å¹´8月27日星期三UTC-4上åˆ10æ—¶38分42秒，Leiby, Paul Newsome写é“：
Hi Songming Zhu
I’m not entirely clear on your question, but I understand it to be asking how to divide one (static) set v into two dynamic subsets, t and s
(on your loop, why “until k=10�).
You can set the elements of the dynamic sets with the conditional assignment “= YES $ (condition)†syntax.
You can establish a condition to get alternating elements by using the modulo operator on the ordinal value of the index v.
\
- scalars k /0/ // unneeded
sets v /1*100/
t(v)
s(v);
t(v) = YES $ mod(ORD(v),2);
s(v) = YES $ (not t(v));
DISPLAY t,s;
I hope this helps
Paul
From: gams...@googlegroups.com [mailto:gams...@googlegroups.com] On Behalf Of Songming Zhu
Sent: Wednesday, August 27, 2014 9:53 AM
To: gams...@googlegroups.com
Subject: Re: how to divide one dynamic set into two subsets
scalars k /0/
sets v /1*1000/
t(v)
s(v);
repeat k=k+1;
if k is odd, i need to record t(v)=1,3,5,7 as index
if k is even, i need to record s(v)=2,4,6,8 as index
until k=10;
any1 who can help me with this case? how can I program it in gams?
i am very confused with gams’ syntax
Sincerely
\
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