How to make a matrix compose by seperate optimization variables
显示 更早的评论
Hi everyone,
I am thinking if it possible to put several optimizaiton variables into a matrix form. My optimization variable is defined by this syntax:
>> z1=optimvar('z1','Type','integer','LowerBound',0,'UpperBound',1)
>> z2=optimvar('z2','Type','integer','LowerBound',0,'UpperBound',1)
>> z3=optimvar('z3','Type','integer','LowerBound',0,'UpperBound',1)
zij=['z1','z2','z3';'z2','z2','z3';'z3','z3','z3']
It turns out that my 'zij' is a set of arrays not matrix. Anyone has idea about that? Thanks so much!
采纳的回答
Matt J
2019-7-2
This works fine, once you remove the quotes
>> zij=[z1,z2,z3; z2,z2,z3; z3,z3,z3];
>> showexpr(zij)
(1, 1)
z1
(2, 1)
z2
(3, 1)
z3
(1, 2)
z2
(2, 2)
z2
(3, 2)
z3
(1, 3)
z3
(2, 3)
z3
(3, 3)
z3
3 个评论
BOWEN LI
2019-7-3
If all the matrix elements Zmatrix(i,j) were independent variables, you could do so as follows,
Zmatrix=optimvar('optimv',[3,3],'Type','integer','LowerBound',0,'UpperBound',1);
However, in your posted example, the Zmatrix(i,j) were not all independent of each other.
You can create a "dependent optimization variable" for your posted example like this,
z=optimvar('z',[3,1],'Type','integer','LowerBound',0,'UpperBound',1);
Zmatrix=z([ 1 2 3; 2,2,3;3 3 3]);
So, note that this Zmatrix object is of type OptimizationVariable,
Zmatrix =
3×3 OptimizationVariable array with properties:
Read-only array-wide properties:
Name: 'z'
Type: 'integer'
IndexNames: {{} {}}
Elementwise properties:
LowerBound: [3×3 double]
UpperBound: [3×3 double]
Reference to a subset of OptimizationVariable with Name 'z'.
however, it is really just a matrix of pointers, basically, to different z(i). It has no independence existence of its own. In particular, if you modify Z(1,2).LowerBound, then Z(2,1).LowerBound and Z(2,2).LowerBound will change as well, because we defined all three to be aliases of the same independent variable z(2). For additional reading,
BOWEN LI
2019-7-3
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Solver Outputs and Iterative Display 的更多信息
Translated by 
