How to interface with a DLL in R?

I created dll extensions from Matlab. Then, I want to read that dll in R开发者_StackOverflow社区.

I used dyn.load() but it does not works.

May you give me some suggestion?

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What language was the source code written in?

The trouble is mixing compilers. The Matlab dll is likely to have been built by Visual Studio. And you simply cannot mix C++ code between different compilers as function identifiers get mangled. You can, with some work, mix C object code. There are some FAQ on the MinGW site.

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Based on the discussion in the comment thread below @Mario's answer: I was going to suggest you try the comparison you did (R CMD SHLIB dll vs Matlab dll) to help diagnose the problem. Based on the result, I think that you need to figure out what the calling syntax for the dll would be in C and write a small C wrapper for it that uses that syntax but is in turn R CMD SHLIB-able ... R CMD SHLIB --help says you can include linker options on the command line (i.e. making sure that you are linking your Matlab-callable dll with your R-callable dll), but I'm not sure of the precise syntax. It would probably help to study relevant section of the R Extensions manual a bit.

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Some more information is necessary. The regular way to do it is like this:

dyn.load("/path/to/library");

Some pointers:

• make sure that the architecture of the library is correct (e.g. 'x86_64' vs 'i386' vs 'armv7')
• make sure that you're not trying to load a windows '.dll' on unix-based machines ('.so', '.dylib')