NONLCON must be a function using lsqnonlin

2 次查看（过去 30 天）

显示更早的评论

James99 2023-8-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2013652-nonlcon-must-be-a-function-using-lsqnonlin

评论： James99 2023-8-28

采纳的回答： Matt J

AC_parameter_estimation_PoreDiffusion.m

在 MATLAB Online 中打开

Hello everyone!

I am trying to estimate parameters using lsqnonlin and I get the following error:

Error using cnls
NONLCON must be a function
Error in lsqnonlin (line 220)
[xCurrent,Resnorm,FVAL,EXITFLAG,OUTPUT,LAMBDA,JACOB] = cnls(caller, FUN,xCurrent,A,B,Aeq,Beq,LB,UB,NONLCON, ...

I have no nonlinear constraints and therefore I left NONLCON as empty square brackets. I don't understand where I am going wrong.

The error occurs on line 70.

采纳的回答

Matt J 2023-8-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2013652-nonlcon-must-be-a-function-using-lsqnonlin#answer_1294502

编辑：Matt J 2023-8-27

No, you have set the nonlcon argument to Cexp which is a numeric vector. You should review the documentation for the correct ordering if the arguments.

6 个评论
显示 4更早的评论隐藏 4更早的评论

Matt J 2023-8-28

If the optimization time is long, it doesn't necessarily mean you have slow convergence. If one execution of resfun takes a long time, that will also make the optimization time longer.

James99 2023-8-28

Right, but the warnings about not reaching the solution without reducing the time step below a permitted value a part of the process? I noticed that MATLAB continues with the calculation despite of these warnings. I suppose it does that particular iteration with smallest permitted time step value.

请先登录，再进行评论。