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[Help-glpk] complex objective expression
From: |
Ilya Orlov |
Subject: |
[Help-glpk] complex objective expression |
Date: |
Thu, 12 Nov 2009 21:17:31 +0300 |
I #39;d like to solve a set covering problem, very close to described in this
article (http://www.ibm.com/developerworks/linux/library/l-glpk3/), but I dont
know if it is possible at all using glpk.
I have a list of items. Each item have type and values for several params:
item id type param1 param2 param3
1 1 1 0 1
2 1 2 0 1
3 2 2 1 0
and so on..
I need to select one item of each type and I created such program with first,
very simple objective function - maximize sum of all parameters for choosen set
of items:
maximize z: sum {i in ITEMS, j in PARAMS} y[i] * params[i,j];
But in real task objective function should be much more complex.
1. for each parameter should be function like param1Fn(param1_value) := c0 +
(c1 / (1 + e^(s2 *(param1_value + a3 + a4 * param1_value * a5) ) ) );
2. objective function should be combination of all params functions, like z = (
param1Fn(param1) / const1 ) * param2Fn(param2) etc..
Is it possible to create such objective function using glpk?
Thanks,
Ilya
I have a list of items. Each item have type and values for several params:
item id type param1 param2 param3
1 1 1 0 1
2 1 2 0 1
3 2 2 1 0
and so on..
I need to select one item of each type and I created such program with first, very simple objective function - maximize sum of all parameters for choosen set of items:
maximize z: sum {i in ITEMS, j in PARAMS} y[i] * params[i,j];
But in real task objective function should be much more complex.
1. for each parameter should be function like param1Fn(param1_value) := c0 + (c1 / (1 + e^(s2 *(param1_value + a3 + a4 * param1_value * a5) ) ) );
2. objective function should be combination of all params functions, like z = ( param1Fn(param1) / const1 ) * param2Fn(param2) etc..
Is it possible to create such objective function using glpk?
Thanks,
Ilya
- [Help-glpk] complex objective expression,
Ilya Orlov <=