Zaikun Zhang

Sun Yat-sen University

Last seen: 2 months ago | Active since 2019

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http://www.zhangzk.net

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MATLAB 2025a segfaults on Ubuntu when handling Fortran MEX files with internal subroutines
This issue is due to increased security measures on Linux machines. Starting in R2025a, the execstack flag of the MATLAB executa...

12 days ago | 0

| accepted

Question

An issue with parfor in MATLAB R2023a--R2025a
Consider two MATLAB m files named profile.m and try_parfor.m as follows. % profile.m function profile() olddir = pwd(...

2 months ago | 0 answers | 2

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answers

Question

MATLAB 2025a segfaults on Ubuntu when handling Fortran MEX files with internal subroutines
This is very likely a bug of MATLAB R2025a on Ubuntu. I would like to know whether anyone else can reproduce it (on Ubuntu). Tha...

5 months ago | 1 answer | 0

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answer

Submitted

PDFO: Powell's Derivative-Free Optimization solvers
Interfaces by Tom M. Ragonneau and Zaikun Zhang for using the late Professor M. J. D. Powell's derivative-free optimization solv...

1 year ago | 3 downloads |

0.0 / 5

Submitted

PRIMA: Optimization without Using Derivatives
PRIMA is a package for solving general nonlinear optimization problems without using derivatives.

1 year ago | 3 downloads |

5.0 / 5

Question

Does MEX of MATLAB R2023b (update 6) on macOS-13 work with Xcode 15 and Intel oneAPI 2023?
[Update 20240217: I am almost sure that this is a bug of MATLAB R2023b. The default MEX options are wrongly specified. They are ...

2 years ago | 0 answers | 1

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Answered
Strange behavior of `copyfile` regarding symlinks on Linux and macOS
Update 20231031: Below is the response from MathWorks support. " Please be assured that this has been confirmed as a bug and i...

2 years ago | 0

| accepted

Question

Strange behavior of `copyfile` regarding symlinks on Linux and macOS
Consider the following function. %test_copyfile.m function test_copyfile() ...

2 years ago | 1 answer | 0

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answer

Submitted

MatCUTEst
MatCUTEst is a package for facilitating the usage of CUTEst (https://github.com/ralna/CUTEst) in MATLAB on Linux.

2 years ago | 1 download |

0.0 / 5

Submitted

setup_mex: Set up MEX on Windows and macOS for Fortran and C
This package provides scripts that facilitate setting up the MATLAB MEX on Windows and macOS for compiling Fortran and C using I...

2 years ago | 11 downloads |

0.0 / 5

Answered
fmincon optimization not running properly, stops beacuase of StepTolerance
I conducted a quick experiment using the function and data in the question. The solvers are fmincon of MATLAB and PRIMA, which i...

2 years ago | 1

Answered
Bug in MATLAB R2022a: MEX does not support gfortran 8.x as specified in the official documentation
According to MEX team (20220406, copied from a GitHub Issue): This is bug with R2022a and we are fix it as soon as possible. T...

3 years ago | 1

| accepted

Question

Bug in MATLAB R2022a: MEX does not support gfortran 8.x as specified in the official documentation
Update (20220406): The MathWorks MEX team has confirmed this problem as a bug of MATLAB R2022a. A workaround is provided by the ...

3 years ago | 1 answer | 0

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Question

Does the execution of addpath/rmpath/savepath in one workspace affect other workspaces?
Does the execution of addpath/rmpath/savepath in one workspace affect other workspaces? Suppose that I have two instances of MA...

3 years ago | 1 answer | 0

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Answered
Bug: MATLAB crashes when mexifying the official `timestwo.c`
Here is the latest update (20220225) received from the supporting team of MathWorks: ``` Got the confirmation that the crash...

3 years ago | 0

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Answered
Why trust-region-reflective algorithm in fmincon require a gradient as input?
What you @SM are looking for is called Derivative-Free Optimization methods. They do not require derivatives or analytical formu...

3 years ago | 0

Question

Is MEX known to be slow on macOS?
Question: Is MEX known to be slow on macOS? Here, "slow" refers to the speed of setting MEX up, of compiling MEX code, and of ...

3 years ago | 0 answers | 0

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answers

Question

Bug: MATLAB crashes when mexifying the official `timestwo.c`
Update (20220225): Here is the latest update received from the supporting team of MathWorks. ``` Got the confirmation that th...

4 years ago | 1 answer | 0

1

answer

Answered
Need help with mathematical optimization - fmincon
Your problem is a simulation-based optimization problem. You may try PDFO ( https://www.mathworks.com/matlabcentral/fileexchan...

5 years ago | 0

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Supress MEX warning: f951: Warning: Nonexistent include directory ‘MATLABROOT/simulink/include’ [-Wmissing-include-dirs]
I have MATLAB 2019b but not simulink installed on my computer (ubuntu 16.04). When trying mex(fullfile(matlabroot, 'extern', 'e...

5 years ago | 1 answer | 0

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Question

Recursive definition of anonymous function
(Note that the mathematics in this question is hypothetical and illustrative.) Suppose that I am writing a function "foo" to mi...

5 years ago | 1 answer | 1

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Question

The return type of mxIsDouble, mxIsSingle, and mxIsClass (mex for Fortran)
According to https://www.mathworks.com/help/matlab/apiref/mxisclass.html the return of mxIsDouble for Fortran (also mxIsSingle ...

6 years ago | 1 answer | 0

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Question

Portable declaration of REAL variables in mex gateway for Fortran
(The same question is asked here: https://stackoverflow.com/questions/57244555/portable-declaration-of-real-variables-in-mex-gat...

6 years ago | 1 answer | 0

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