How to count the number of variables?
How to count the number of variables?
Hello, does anyone can help me with counting the number of the solutions?
Suppose I have a set of x(k,n) as following:
x(1,1) = ...,
x(1,2) = ...,
.
x(1,n) =...,
.
x(k,n) = ...,
how can i count the number of variables by dimension "k" or "n"? e.g. how many x(1,n) in the optimal solution? Thanks in advance!
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RE: How to count the number of variables?
Hi Peiyu
I probably don’t understand your question, because the number of x(1,?) is in this case n (or in Gams card(n)).
I assume you have n x for k=1 and only some of them contain a solution, and now you want to know how many there are. Let us assume that if x(k,n) is equal to 2, this means you have a solution, and otherwise there is no solution.
You could do this as follows:
Parameter numbersolutions(k) Number of solutions for each k;
Numbersolutions(k) = sum(n$(x(k,n) = 2), 1);
This sums the value of 1 only then when x(k,n) equal is to 1.
Hope this helps
Cheers
Renger
From: gamsworld@googlegroups.com [mailto:gamsworld@googlegroups.com] On Behalf Of Peiyu Luo
Sent: Wednesday, March 23, 2016 2:09 AM
To: gamsworld
Subject: How to count the number of variables?
Hello, does anyone can help me with counting the number of the solutions?
Suppose I have a set of x(k,n) as following:
x(1,1) = ...,
x(1,2) = ...,
.
x(1,n) =...,
.
x(k,n) = ...,
how can i count the number of variables by dimension "k" or "n"? e.g. how many x(1,n) in the optimal solution? Thanks in advance!
--
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