How to handle stiffness parameter using Try and Catch?
显示 更早的评论
Hi all,
I'm trying to do parameter estimation (using GA) in my stiffness 1D ODE system.
When GA automatically try various parameter values to fit data, some parameter cases are so sensitive that main function were shut down due to stiffness problem.
In this case, how to handling exception case using "try and catch" ?
In my system, I solve 95 ODEs simultaneously. Among them a parameter affects several ODEs and it cause stiffness problem.
I want to change setting parameter value as zero in case of stiffness problem.
Regards,
Kim.
采纳的回答
Mohammad Sami
2020-9-3
编辑：Mohammad Sami
2020-9-3
You can perhaps try a for loop over the various parameters.
% assuming you have 5 parameters needed for your function
% and you have 20 different combinations you want to try
parameters = cell(20,5);
% assign parameters
errors = cell(20,1);
for i = 1:size(parameters,1)
try
somefunction(parameters{i,1},parameters{i,2},parameters{i,3},parameters{i,4},parameters{i,5});
% or short form
%somefunction(parameters{i,:});
catch ME
errors{i} = ME;
end
end
2 个评论
Jinsu Kim
2020-9-3
Mohammad Sami
2020-9-3
If the error is thrown by the function you are optimizing, you can put try catch inside the function. In the catch you can assign an output value such as 0 or Inf depending on your use case.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Ordinary Differential Equations 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
