help with Compiling a mex-file

Question

Abdelmalek Benaimeur 2019-6-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/465368-help-with-compiling-a-mex-file

评论： Walter Roberson 2023-9-13

采纳的回答： Walter Roberson

hello Folks,

I downloaded a Matlab package for probabilistic modeling of circular data with mixtures of von Mises distributions.

please see this link

https://github.com/chrschy/mvmdist?fbclid=IwAR1xY51kNpc6aYDoJ8GYAXkPC-A3tK6YvrKXwsi4-yudDq32OykR7IFOfq4

in the installation phase i have to do this :

Clone or download this repository and add it to your MATLAB search path.
Compile the *.mex-file located at @VonMisesMixture/private by browsing to that directory in MATLAB and running mex sampleVonMisesMex.c from the command line.

i didn't understand how to do the second step if any one can help

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Answer 1

Walter Roberson 2019-6-3

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/465368-help-with-compiling-a-mex-file#answer_377680

在 MATLAB Online 中打开

cd to the directory that you downloaded the code into.

Give the command

mex sampleVonMisesMex.c

If the compiling works then the routine should be ready to use, callable under the name sampleVonMisesMex

Before doing all of this you need to have installed a support compiler for your operating system and release, and have given the command

mex -setup c

and chosen a compiler if more than one is offered.

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Answer 2

Abdelmalek Benaimeur 2019-6-3

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/465368-help-with-compiling-a-mex-file#answer_377685

在 MATLAB Online 中打开

i got this error

>> mex sampleVonMisesMex.c
Building with 'MinGW64 Compiler (C)'.
C:\Program Files\MATLAB\R2018b\bin\mvmdist-master\@VonMisesMixture\private\sampleVonMisesMex.c: In function 'sample':
C:\Program Files\MATLAB\R2018b\bin\mvmdist-master\@VonMisesMixture\private\sampleVonMisesMex.c:54:32: warning: implicit declaration of function 'random' [-Wimplicit-function-declaration]
  srand( time(NULL) + clock() + random() );
                                ^~~~~~
Error using mex
C:\Users\mbenm\AppData\Local\Temp\mex_10616001118706_3404\sampleVonMisesMex.obj:sampleVonMisesMex.c:(.text+0x65):
undefined reference to `random'
collect2.exe: error: ld returned 1 exit status
 

would you please tell me what to do ?

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Walter Roberson 2019-6-3

Hmmm, I do not know where they are expecting to get random() from. random() is not part of the C language standard. C++ has a header named "<random>" but none of the functions are named random()

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