What are the orders of the variables and constraints exported by the 'export' command consistent with?

[qi wang]

What are the orders of the variables exported by the 'export' command consistent with? similarly, what are the orders of the constraints exported by the 'export' command consistent with? 

Does it depend on the order in which the variables are defined? And the order in which the constraints are written?

For example:

x1=sdpvar(2,1);

x2=sdpvar(2,1);

x3=sdpvar(2,1);

Con=[];

Con = Con + [lb1<=x1<=ub1];

Con = Con + [lb2<=x2<=ub2];

Con = Con + [lb3<=x3<=ub3];

Con = Con + [lb4<=x1+x3<=ub4];

Con = Con + [lb5<=x2+x3<=ub5];

obj=A*[x1;x2];

options = sdpsettings('solver','cplex','verbose',1);

[model,recoverymodel,diagnostic,internalmodel] = export(Con,obj,options);

The details in the exported 'model' are as follows:

model.H,model.f,model.Aineq,model.bineq ...

,model.Aeq,model.beq,model.lb,model.ub

[Johan Löfberg]

in the order they were defined

[qi wang]

After using the optimize command,

Can we use the following expression to get the value of obj

obj_value=double(obj);

[Johan Löfberg]

Of course, except that it is called value, not double.

https://yalmip.github.io/tutorial/basics/

[qi wang]

Thx for you reply. I have another two questions.

1. Is there any difference between value and double?  I tried. The values got by the two commands are the same.

2. The result got by value(obj) is different from the objective value got by cplexqp.  Why is this? I have no idea.

[Johan Löfberg]

there is no official command called double

typically difference is that there is an additive constant in the objective which isn't used by the solver