How can I call a .C function compiled with Matlab Coder in R?

I would like to call a C function compiled using Matlab Coder in R for later use in a Shiny app. How can I go about doing this. The top of the .C function looks like this:

double ensembleBaggedTreesExtendedStay_V1(double TransferredYesNo,

double BleedDisYesNo,

double PreOpAlbumin, double PreOpHCT,

double ASAClass, double ComplexYesNo)

and the file name for the c function is "ensembleBaggedTreesExtendedStay_V1.c"

I have very limited knowledge of R and .C and I would appreciate any help.

Answer 1

[Harsh]

Hi Arsalan,

Proceed with the steps outlined below to call the C function generated by MATLAB coder in R using .C( ) –

• Modify your “ensembleBaggedTreesExtendedStay_V1” function such that it returns void and stores the desired result in one or more arguments expressly created for this purpose. Also, the function should have a C_ prefix.
• Compile the function into a shared library accessible to R using this command:

R CMD SHLIB ensembleBaggedTreesExtendedStay_V1.c 

• Within an active R session, link to the shared library using dyn.load("ensembleBaggedTreesExtendedStay_V1.so").
• Write an R wrapper to call the C function using .C with the following syntax: .C("C_my_func", arg1, arg2).

Hope this resolves your query. Happy coding !