Difference between MATLAB on Mac & Windows?
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I running the exact same test on the exact same code (ensured by checking out the same revision of a code repository) on a Windows computer and on a Mac, and the test failed on Windows but passed on Mac.
I think I've controlled for all the differences between the two environments: in both scenarios Matlab is 8.4.0.150421 (R2014b), the relevant toolboxes all seem to be the same version, the path is set the same, and the code is exactly the same.
I did notice that the JVMs are different (Java 1.7.0_55-b13 on the Mac and Java 1.7.0_11-b21 on Windows), but it seems that the JVMs are packaged with Matlab, so I can't control that?
Any advice would be greatly appreciated.
4 Comments
Sanjana Chhabra
on 16 Nov 2021
on copying and pasting code windows matlab automatically preserves the line break but macOS pastes all the code in one line. Can someone help??
Accepted Answer
Walter Roberson
on 7 Aug 2015
The implementations on different operating systems are permitted to have different default rounding modes. Have a look at http://undocumentedmatlab.com/blog/undocumented-feature-function for information on feature() and system_dependent()
The different operating systems definitely have BLAS and LAPACK compiled differently, and on MS Windows you may being using Intel's MLK. MS Windows in particular is known for having a different version of MLK for different CPU architectures (AMD vs Intel for example, but even different families within a manufacturer.)
For this reason, you should not expect that the bottommost bits of a calculation will be exactly the same on different systems.
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More Answers (1)
jesus osiel moya fuentes
on 8 Dec 2021
What are the restrictions if I make an executable program on MAC or WINDOWS?
1 Comment
Walter Roberson
on 8 Dec 2021
Mac does not support activex or .NET, or use of MATLAB as an Automation Engine
Mac does not support writing .xls or .xlsx files using xlswrite() -- but does support writing them with writetable(), writematrix(), and writecell()
There are some toolboxes that are not supported on Mac
There are probably some other items.
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