rdotnet | NET interop library to call the R statistical language | Script Programming library

I am using R.NET to generate plots (using ggplot) and I want to save these graphs in PNG format on disk. Whenever I call engine.Evaluate("ggsave('C:\path\to\file.png', myPlot)") the program abruptly aborts with exit code 2 without anything being written to disk; no error is displayed when this happens. It is also not possible to write the plot to a file using png() or pdf(). This problem is not specific to ggplot, however - I also cannot store plots generated via the native plot function.

I could narrow down the problem to the line containing either ggsave() or png()/pdf(): when this line is executed, the program aborts. Since I can actually see the plots generated by both, ggplot() and plot(), the plotting itself does not seem to be the issue.

You should be able to recreate what I described using the following C# code:

I have a question about the sign of t in a paired-sample t-test using different data structures, but the same data. I know that the sign doesn't make a difference in terms of significance, but, it does generally tell the user if there have been decreases over time or increases over time. So, I need to make sure that the code I provide produces the same results OR, is explained correctly.

I have to explain the results (and code) as an example we're giving users of our software, which uses R (Rdotnet within a C# program) for statistics. I'm unclear as to the proper order of variables in both methods in R.

Method 1 uses two matrices

I'm using R in a C# webapplication with R.NET. When I add the code below in my webapplication I get following error. But when I run the same code in a console application it works fine. I have no idea why it doesn't work in a webapplication.

Error message:

I want to transmit R result expression to integer variable using this code :

i'm using c# and R.NET.Community package to run R script from a c# application, i can run any script with no reference to rjava library with the code below but the code below crashed when the script contain the line Library(rJava) and gives me RDotNet.EvaluationException: 'Error: package or namespace load failed for 'rJava', error: unable to load shared object 'C:/Users/..../Documents/R/win-library/3.4/rJava/libs/i386/rJava.dll', i can run the script all right from Rstudio with no errors and correct output, but it gives this error when running it using RDotNet and C#

I am trying to use the R type provider to fit and predict a Support Vector Machines model. I was able to fit the model but when I try to predict the returned vector has the same length as the training vector, which it should not have.

I tried the equivalent code directly in R and the returned list has the correct length.

Why is this happening?

Here is an example:

I am trying to implement an ICharacterDevice for capturing the full output. I have found some information on this such as:

Implementing an interactive R console in c# / rdotnet?

I am however finding it impossible to find a full example and struggling to get this working on my own. Has anyone done this before with an example?

Many thanks

Mark

I used R.NET to perform Change Point Detection as following

We have created a webservice on IIS which calls a R script. The R script includes some libraries like: data.table, caret and few a more. R is returning an error that it cannot find the data.table library:

"Error in library(data.table) : there is no package called 'data.table'".

We confirmed that the data.table package is installed in: "C:\Program Files\R\R-3.3.3\library\data.table". When we run .libPaths() to check where R tries to load the libraries from, it returns that this is the folder "C:/Program Files/R/R-3.3.3/library".

It does work successfully in a Visual Studio 2017 unit test or even in a console application environment. So the question is why can't R load the data.table library within IIS?

We using the following software versions:

• R for Windows 3.3.3
• Internet Information Services version 10.0.14393.0
• RDotnet community 1.6.5

C# code: