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SWilson
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Joined: February 13th, 2018, 5:27 pm

RTOOLS and C# Visual Studio

April 18th, 2018, 6:24 pm

Anyone using Rtools/R.NET engine in their C# code.  As in, there are some packages that let you source the script vs just using the Rtools functions within the C# code.  Just wanted to know if anyone has experience in this and share some best practice.  Thanks.  
 
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Hansi
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Joined: January 25th, 2010, 11:47 am

Re: RTOOLS and C# Visual Studio

April 18th, 2018, 8:59 pm

Yes, R.NET is a buggy, barely supported thing that doesn't lend itself well to multiple R processes on the same machine. If you only need one R process and use it serially then it's fine.

RTools is a very specific thing, I don't think that's what you are talking about: https://cran.r-project.org/bin/windows/Rtools/

Not used http://bluemountaincapital.github.io/FSharpRProvider/ but it looks okay for serial things.

https://github.com/Microsoft/R-Host from MS is decent and used in RTVS

What we wound up using was creating our own engine in C# that spins up N R processes on the machines and binds functions to WebAPI and use that.

If not bounded by deploying to Windows https://www.opencpu.org/ is good.
 
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SWilson
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Joined: February 13th, 2018, 5:27 pm

Re: RTOOLS and C# Visual Studio

April 19th, 2018, 12:54 pm

Thank you.  This helps, especially with the serial issue.  We'll have to work around that. I actually was using the stand alone R GUI to validate functions and then as you say, spun up the engine in VS and worked the code once I had what I wanted.  I don't think the RHost will help us much but your feedback did help nonetheless.  
 
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Cuchulainn
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Re: RTOOLS and C# Visual Studio

April 19th, 2018, 3:08 pm

I haven't used this but here's a convoluted answer. Use bilingual C++/CLI (a .NET language) that interfaces with both C# and native C++. (we did its using a front-end Excel-DNA application to Quantlib code). You do have to write some wrapper classes but it's very easy. We (DD/MK) have two planned Wilmott articles on this approach. 
So its like C# -> C++/CLI -> Natives.

Just an idea.

Rcpp could be the native in this case.

https://cran.r-project.org/web/packages/Rcpp/index.html
 
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SWilson
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Joined: February 13th, 2018, 5:27 pm

Re: RTOOLS and C# Visual Studio

April 23rd, 2018, 5:47 pm

Thanks for the insight.  This look practical using multiple R functions but for now R.NET seems to be holding up fine.  Hoping there will be something standardized in the future.  Looking forward to the articles, love leveraging the speed of C++.
 
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Hansi
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Joined: January 25th, 2010, 11:47 am

Re: RTOOLS and C# Visual Studio

April 24th, 2018, 9:27 am

I haven't used this but here's a convoluted answer. Use bilingual C++/CLI (a .NET language) that interfaces with both C# and native C++. (we did its using a front-end Excel-DNA application to Quantlib code). You do have to write some wrapper classes but it's very easy. We (DD/MK) have two planned Wilmott articles on this approach. 
So its like C# -> C++/CLI -> Natives.

Just an idea.

Rcpp could be the native in this case.

https://cran.r-project.org/web/packages/Rcpp/index.html
Rcpp -> Run C++ code in R.
 
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Cuchulainn
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Re: RTOOLS and C# Visual Studio

April 24th, 2018, 1:30 pm

I haven't used this but here's a convoluted answer. Use bilingual C++/CLI (a .NET language) that interfaces with both C# and native C++. (we did its using a front-end Excel-DNA application to Quantlib code). You do have to write some wrapper classes but it's very easy. We (DD/MK) have two planned Wilmott articles on this approach. 
So its like C# -> C++/CLI -> Natives.

Just an idea.

Rcpp could be the native in this case.

https://cran.r-project.org/web/packages/Rcpp/index.html
Rcpp -> Run C++ code in R.
I see. I was a bit quick of the mark in this case. 
 
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Cuchulainn
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Re: RTOOLS and C# Visual Studio

April 24th, 2018, 2:21 pm

Thanks for the insight.  This look practical using multiple R functions but for now R.NET seems to be holding up fine.  Hoping there will be something standardized in the future.  Looking forward to the articles, love leveraging the speed of C++.
You're welcome.
The 2 articles with Mikael Katamajaeki are planned for July and September in the Wilmott journal.
All this multi-language approach has benefits, e.g. calling F# DiffSharp from C# or C++/CLI is easy and transparent.
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