"Mex file generation" invalid character code error

Question

Douglas 2015-7-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/230241-mex-file-generation-invalid-character-code-error

评论： konmin dung 2021-4-11

When I tried to convert the following code to a mex file using coder I've gotten the following error:

Caught "std::exception" Exception message is:
Invalid character code sequence detected.

CODE 1:

%   Y: new data matrix
%   X: training data matrix, each row is one observation, each column is one feature
%   type: type of kernel, can be 'simple', 'poly', or 'gaussian'
%   para: parameter for computing the 'poly' kernel, for 'simple'
%       and 'gaussian' it will be ignored
%   K: kernel matrix
%   Copyright by Quan Wang, 2011/05/10
%   Please cite: Quan Wang. Kernel Principal Component Analysis and its
%   Applications in Face Recognition and Active Shape Models.
%   arXiv:1207.3538 [cs.CV], 2012.
function K=kernel_NewData(Y,X,type,para) %#codegen
N=size(X,1);
if strcmp(type,'simple')
    K=Y*X';
end
if strcmp(type,'poly')
    K=Y*X'+1;
    K=K.^para;
end
if strcmp(type,'gaussian')
    K=distanceMatrix([X;Y]);   
    K=K(N+1:end,1:N);
    K=K.^2;
    K=exp(-K./(2*para.^2));
end

The above distanceMatrix() has only matrix multiplication and conditional operations.

Then, I have tested also a short code "soma.m", but the error persists:

CODE 2

function c = soma(a,b) %#codegen
c =a+b;

Does anybody knows how to solve this?

I'm working on ubuntu 14.04 with gcc/g++ 4.7.

Thanks.

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Walter Roberson 2015-7-17

Could you describe further how you are invoking the coder?

Ryan Livingston 2015-7-20

Do you have any non-ASCII characters in any relevant directory names? Maybe in pwd, matlabroot, or the codegen build directory?

It would likely be good to contact MathWorks Technical Support regarding this as well.

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Answer 1

Harsheel 2015-7-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/230241-mex-file-generation-invalid-character-code-error#answer_186619

This may occur if your MATLAB current working directory has non-ascii characters. To resolve this, remove any non-ascii character in the full path of the current working directory.