R Engine is not initializing

Question

static void Main(string[] args) { // Set the folder in which R.dll locates. var envPath = Environment.GetEnvironmentVariable("PATH"); var rBinPath = @"C:\R-3.0.2\bin\i386\"; Environment.SetEnvironmentVariable("PATH", envPath + Path.PathSeparator + rBinPath); using (REngine engine = REngine.CreateInstance("RDotNet")) { // Initializes settings. engine.Initialize(); // After Executing this line its crashing. NumericVector group1 = engine.CreateNumericVector(new double[] { 30.02, 29.99, 30.11, 29.97, 30.01, 29.99 }); engine.SetSymbol("group1", group1); NumericVector group2 = engine.Evaluate("group2 <- c(29.89, 29.93, 29.72, 29.98, 30.02, 29.98)").AsNumeric(); // Test difference of mean and get the P-value. GenericVector testResult = engine.Evaluate("t.test(group1, group2)").AsList(); double p = testResult["p.value"].AsNumeric().First(); Console.WriteLine("Group1: [{0}]", string.Join(", ", group1)); Console.WriteLine("Group2: [{0}]", string.Join(", ", group2)); Console.WriteLine("P-value = {0:0.000}", p); Console.ReadLine(); } 

}

Hi When I executed the above code it is crashing while initializing. OS is Windows XP sp3(32 bit) R version- R-3.0.2 using R.Net(1.5 version)

Please help me to connect to R from c#

Answer 1

I think that the engine crashes because you have some R-path error. better to read the path from windows registry.

Try something like this:

using (RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\R-core\R")){ var envPath = Environment.GetEnvironmentVariable("PATH"); string rBinPath = (string)registryKey.GetValue("InstallPath"); string rVersion = (string)registryKey.GetValue("Current Version"); rBinPath = System.Environment.Is64BitProcess ? rBinPath + "\\bin\\x64" : rBinPath + "\\bin\\i386"; Environment.SetEnvironmentVariable("PATH", envPath + Path.PathSeparator + rBinPath); } using (REngine engine = REngine.CreateInstance("RDotNet")){ // same code here } 

Of course you should ad the right references:

using Microsoft.Win32; using RDotNet; using System.IO; 

Answer 2

I had the same issue. Crash at engine.Initialize() call. I reinstalled R for windows as administrator and registered keys in registry. R.NET works fine now even in ASP.NET application.