Hi, check nuget to get various matfile wrapper. This way you can interchange data with matfiles. Please note they only support an older Matfiles format. You can also export as csv or text file and import in matlab, see @seghierkhaled provided link. The pro-solution is via interprocess communication. Matlab allows to deal with dotnet objects. This way you can create a C# middleware which interchanges data between Matlab and Rhino/GH in a client-server manner. This however requires an advanced understanding of programming, but also gives the highest degree of freedom and automatisation.