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Frank


Last seen: 5 months ago |  Active since 2018

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how does fmincon deal with ill-conditioned problem?
Do I need to do regularization to my problem such as with Tikhonov regularization before applying fmincon? Thank you very much!...

7 months ago | 3 answers | 0

3

answers

Question


selecting units for (1) scaling of variable and (2) condition number minimization
In gradient-based optimization problem, selecting units can influence the condition number of the gradient. A smaller condition...

9 months ago | 1 answer | 1

1

answer

Question


fmincon stopped when Norm of step is far larger than StepTolerance
My Norm of step is about 10 and my StepTolerance is 1.0000e-14. Then Matlab says: fmincon stopped because the size of the curr...

9 months ago | 1 answer | 1

1

answer

Question


how does fmincon interior-point algorithm deals wtih underdetermined system?
I am working on a tomography problem that may become underdetermined during iteration. To handle this, I may give NaN to fmincon...

11 months ago | 1 answer | 0

1

answer

Question


my nonlinear constraints HAVE to be satisfied, what to do next?
I am working on a sophisticated anisotropic tomographic modeling project. I recently learned that the fmincon function in MATLAB...

12 months ago | 2 answers | 0

2

answers

Question


Is it it possible to make fmincon strictly follows the nonlinear constraints?
I have searched and read many articles but didn't find the answer. I often use the fmincon interior-point algorithm. I understa...

12 months ago | 1 answer | 0

1

answer

Question


fmincon nonlinear inequality constraint including variable with range?
function [c,ceq] = nonlcon(x) c(1) The above is the name and content of a nonlinear inequality constraint. If I want to write...

12 months ago | 1 answer | 0

1

answer

Question


Square root in objective function must appear as nonlinear constraints for optimization?
The title already described my question. Let me give a specific example: If I have in my objective function for fmincon to opt...

5 years ago | 4 answers | 0

4

answers

Answered
How to solve LMIs with equality constraints using MATLAB?
Section 2.5 of Byod's book Linear Matrix Inequalities in System and Control Theory specifically talks about this problem.

5 years ago | 0

Answered
Function handle in lsqr
Thank you indeed for your very very specific answer to this question!

5 years ago | 0

Question


Function handle in lsqr
https://www.mathworks.com/help/matlab/ref/lsqr.html In the above page, there is code: function y = afun(x,transp_flag) ...

5 years ago | 2 answers | 0

2

answers