While using MATLAB linear programming for optimization the following error occured
''One or more of the residuals, duality gap, or total relative error
has grown 100000 times greater than its minimum value so far:
the dual appears to be infeasible (and the primal unbounded).
(The primal residual < TolFun=1.00e-008.)''
I tried to change large scale algorithm to simplex algorithm using
f=linprog(costfunction,mat8,mat9,mat11,b,optimset('LargeScale','off','Simplex','on'))
&also
options=optimset('LargeScale','off','Simplex','on');
f=linprog(costfunction,mat8,mat9,mat11,b,options);
and then MATLAB showed an error
LINPROG only accepts inputs of data type double.
Please tell me where I am wrong?Or is there any other way to resolve the problem
''One or more of the residuals, duality gap, or total relative error
has grown 100000 times greater than its minimum value so far:
the dual appears to be infeasible (and the primal unbounded).
(The primal residual < TolFun=1.00e-008.)''
There is another program for lp problems. Try to use cvx instead of linprog:
http://cvxr.com/cvx/
you can use Yalmip in order to solve the linear and nonlinear programming problems. You can still use it when your problem is not convex as well. Check it out !
1)
To use the simplex method, you must be setting 'LargeScale' to 'off' and 'Simplex' to 'he' in options.
This is fine.
2)
You need to give more information about the functions / variables
- costfunction
- mat8
- mat9
- mat11
- b
Everything has to be a double.
If you give the whole script maybe I can help you.
I used the MATLAB interface for ILOG CPLEX during my PhD. It worked well for the problems I had to solve. May be you can try it.
@Krzysztof Smółka
mat8,mat9,mat11,b all are of type 'double' as mentioned in workspace of MATLAB.Only options is of type 'struct' as mentioned in workspace of MATLAB.
mat8 is a matrix of size 128 by 4, mat9 is a matrix of size 128 by 1, mat11 is of size 2by 4 and sizeof b is 2 by 1 ?
Does the error mean i have to convert it into double then how can i do it?
Since problem optimizes without using simplex algorithm
Thanks
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