I'd like to use an API from R that is only available in .NET. Is there a standard method that can be used to call .NET C# code from R? If so, how can I do so?
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2 Answers
Another option that readers of this discussion might consider is the rClr package, which I have been working on for a couple of years to access arbitrary .NET code from R. It is a sibling of R.NET which, conversely, is a way to access R from .NET.
To give a flavour of the rClr package, the canonical "Hello World" looks like:
library(rClr) clrLoadAssembly('c:/path/to/myassembly.dll') myObj <- clrNew('MyNamespace.MyClass,MyAssemblyName') clrCall(myObj, 'SayHelloWorld') Feedback and suggestions welcome via the web site.
- 2Wow - downloaded it and it worked absolutely perfectly!! This package is simply amazing, I look forward to using it a lot in the future. Keep up the good work!– ContangoCommentedOct 1, 2013 at 22:01
library(rClr) clrLoadAssembly('C:\\__\\TstingRLib\\ClassLibrary1\\bin\\Release\\ClassLibrary1.dll') yObj <- clrNew('System.System.Text,System') Type not found: System.System.Text,System Error in clrNew("System.System.Text,System") : Type: System.ArgumentException Message: Could not determine Type from string 'System.System.Text,System' Method: System.Object CreateInstance(System.String, System.Object[]) Stack trace: at Rclr.ClrFacade.CreateInstance(String typename, Object[] arguments) in ___\AppData\Local\Temp\Rtmp2D63Nz\R.INSTALL1f3c2a50350\rClr\src\ClrFacade\ClrFacade.cs:line 316– ArtigaCommentedOct 26, 2015 at 6:32
Exposing the .NET dll as COM dll and then calling a COM object in the dll from R seem to be the only way. And there is a package for it: http://cran.r-project.org/web/packages/rcom/rcom.pdf
If you cannot make a COM dll because it's third-party dll, you can always create a new interface-like .NET dll with COM interface where you can call actual dll.
answered Sep 20, 2012 at 2:41
- 1To get a list of ProgID's in the system, see procbits.com/2010/11/08/…– ContangoCommentedFeb 5, 2013 at 10:02
