Can't find function mcx Matlab

[Maurice]

Dear,

After downloading MCXStudio and running mcxlab in the MATLAB folder into MATLAB, I can't run any of the examples like demo_mcxlab_basic.m due to the error "unrecognized function or variable mcx.m". This function is indeed not in any of the folders. 

What should I do?

Kind regards,

Maurice

[Qianqian Fang]

On 10/24/21 9:05 AM, Maurice wrote:

Dear,

After downloading MCXStudio and running mcxlab in the MATLAB folder into MATLAB, I can't run any of the examples like demo_mcxlab_basic.m due to the error "unrecognized function or variable mcx.m". This function is indeed not in any of the folders.

if you are using Windows, please use the all-in-one installer to install mcxstudio

http://mcx.space/nightly/win64/MCXStudio-nightlybuild-installer.exe

otherwise, you need to run the "mcxsuite_addpath.m" script found at the top level of the unzipped package.

What should I do?

Kind regards,

Maurice

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[Enes Menteşoğlu]

Hi,

Unrecognized function or variable 'mcx'.

Error in mcxlab (line 497)
    [varargout{1:max(1, nargout)}] = mcx(varargin{1});

Error in Kxxx (line 49)
[flux, detp, vol, seeds]=mcxlab(cfg);
 

im using m2 MacBook and have the issue. I run mxsuite_add.. and even added manually still same issue. Can you help me? Thank you

24 Ekim 2021 Pazar tarihinde saat 16:53:20 UTC+3 itibarıyla fan...@gmail.com şunları yazdı:

[Qianqian Fang]

hi Enes,

you can't run mcx/mcxlab on M2 mac, because MCX needs NVIDIA GPU which M2 mac does not have.

you can, however, run mcxcl/mcxlabcl on your M2 mac, you can see my reply to a similar question posted by Emily previously

https://groups.google.com/g/mcx-users/c/yeaV-1gwUNI/m/FgrohfUVAQAJ

Qianqian

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[Subham Mukherjee]

Dear Sir, I could not be able to locate the  "mcxsuite_addpath.m" script in the unzipped folder "mcxlab-win-x86_64-v2025". as i am very new to this platform, can you please help me regarding this.

[Qianqian Fang]

mcxsuite_addpath.m is only included as part of the MCXStudio* packages. Because MCXStudio contains many parts (mcxlab/mmclab/redbird ...), so this script helps setting all paths.

for mcxlab, all you need to do is to add the path of the unzipped folder (where mcx.mex* file exist), and the matlab subfolder.

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[Subham Mukherjee]

Dear Sir, I hope you are doing well, thank you for your kind previous response, actually, I am currently doing the monte carlo photon simulation through python using the pmcx module on a 3d brain mesh. (minc file). I am looking for a pencil source to launch photons from the air. Can you please help me to implement this? I am sharing you with the code and the screenshots of my simulation to get the 3d visualization. if it is possible, please have a look also, my code also needs to be checked because detectors are unable to collect photons to have fluence values. I am currently working on it.

Best Regards,

Subham Mukherjee

Ben-Gurion University of the Negev

Research Scholar

Dept. of Electrical and Computer Engineering

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[Subham Mukherjee]

Dear Sir, this is also to inform you that i have been using a spherical source of certain radius to get the visualizations in the napari image viewer. 

[Qianqian Fang]

Hi Subham, 

Participating discussions in this mailing list, just like in any other public forum on the Internet, it comes with a set of basic expectations  -- that you must have done your due diligence before asking for help.

If a student come to this mailing list, post his/her homework question and ask, "can you help me implement this?" without describing what he/she has done, then the answer is clearly no.

From the question you asked, I don't think I have spent time reading the documentation, or even the readme -- the very first step when using a new software. If you don't even want to spend your time and purely rely on others kindness to make progress, then you are not going anywhere.

Here is your assignment:

First, read the entire article "how to ask questions the smart way", especially this section on what you need to do before asking your question

http://www.catb.org/~esr/faqs/smart-questions.html#before

Second, read pmcx's webpage, 

https://pypi.org/project/pmcx/

run those provided examples, and also read/run other examples in this Jupyter notebook to understand how it works

https://github.com/fangq/mcx/blob/master/pmcx%2Ftutorials%2Fpmcx_getting_started.ipynb

Finally, only if you still find that your question could not be solved after understanding the documentation and examples provided, then, please start a new thread in this mailing list - never hijack someone else's thread and asking a completely irrelevant question.

when you posting your question, make your question very specific:

"I have read A,B and C, based on the examples in D, E, F, and wrote the below code G, trying to achieve H, I am expecting to see I, but I am getting J, how do I fix this?"

then, there is a chance that someone would be able to help you.

Qianqian

On 12/12/25 19:27, Subham Mukherjee wrote:

You don't often get email from subhammuk...@gmail.com. Learn why this is important

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