Mex error while running a code matlab 2021a

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akshara r
akshara r 2021-5-30
回答： Lokesh 2024-5-30
Hi, i'm new to matlab so i can't figure out where the error is. Could somone tell me how I can rectify it
I'm using this code which sombody had already made.
Thanks in advance
function Create_Data()
% This function creates the model data depicted in Figure 4-6 of
%
% Characterization of K-Complexes and Slow Wave Activity in a Neural Mass Model
% A Weigenand, M Schellenberger Costa, H-VV Ngo, JC Claussen, T Martinetz
% PLoS Computational Biology. 2014;10:e1003923
% Move to source folder(assuming it contains the Figures folder
cd ..;
% Check if the executable exists and compile if needed
if(exist('Cortex_mex.mesa64', 'file')==0)
mex CXXFLAGS="\$CXXFLAGS -std=c++11 -O3" Cortex_mex.cpp Cortical_Column.cpp;
end
% Add the path to the simulation routine
addpath(pwd);
% Go back into figures folder
cd Figures;
% Time series
Data_Time_Series(1);
Data_Time_Series(2);
% Time series
Data_Stimulation();
end
First I got this error
>> Create_Data
Building with 'MinGW64 Compiler (C++)'.
Error using mex
g++: error: \-fexceptions: No such file or directory
So, I put D:\MatlabFiles\cortex_mex.cpp
>> D:\MatlabFiles\cortex_mex.cpp
D:\MatlabFiles\cortex_mex.cpp
↑
Invalid use of operator.
But it still said this

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回答（1 个）

Lokesh
Lokesh 2024-5-30
Hi akshara,
It appears that the first issue is related to a compiler flag error when trying to compile a C++ file using the 'mex' function.
As a workaround, adjust the 'mex' command in your MATLAB function by ensuring no backslash precedes '-fexceptions'.
mex CXXFLAGS="$CXXFLAGS -std=c++11 -O3" Cortex_mex.cpp Cortical_Column.cpp;
Refer to this MATLAB Answer for more information:
https://www.mathworks.com/matlabcentral/answers/279171
The second issue involves trying to directly run a C++ file in MATLAB and incorrectly using a file path as a command. MATLAB does not support the direct execution of C++ files. Instead, C++ code must be compiled into a MEX file using the 'mex' command. Additionally, typing a file path directly into the MATLAB Command Window as a command, such as 'D:\MatlabFiles\cortex_mex.cpp', is not a valid operation. If you are trying to change the current working directory to where your files are located, use the cd command followed by the path, like 'cd D:\MatlabFiles'.
Refer to the following documentation for more information on 'mex' function:
https://www.mathworks.com/help/matlab/ref/mex.html

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