Are MATLAB's inbuilt functions and official toolboxes cross-platform consistent?

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Declan - 2021-02-25T11:46:07+00:00
Question: Are MATLAB's inbuilt functions and official toolboxes cross-platform consistent?

I am writing some code which would be executed on different operating systems, both inside  MATLAB and in MCR enviroment. My code does not make use of any random number generator (i.e. the algorithm is completely deterministic) and only make use of inbuilt functions and official toolboxes. I want to know if the inputs are exactly same then would the outputs generated on different platforms be exactly same? In other words, if macOutput and winOutput are output arrays on Mac and Windows platform respectively, then would following always return true ?   isequal(macOutput, winOutput)

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    • Expert Answer

    Profile picture of Neeta Dsouza Neeta Dsouza answered . 2025-11-20

    I would like to respond to a modified version of this question: "How can I make sure the behaviour and numerical results of  MATLAB applications are identical across platforms?"
     
    Note that I write "platform" and not "OS", as one important factor in the area of numerical results is the 32bit/64 bit architecture differences and the 32/64 bit  MATLAB versions. You may also have slightly different results as of BLAS differences. When using e.g. optimization routines, this can result in large differences. The robustness is depending on data and algorithms.
     
    As for OS, the biggest difference I am aware of is about interfaces with other applications or OS. Like reading from Excel or creating MEX files (being depending on different C Compilers).


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