我想使用 Visual Studio C# 2012 中的 R 软件。我注意到有人用 R.NET 做到了这一点。我安装 R.2.15.2(我找到的版本)。我注意到 R.NET 只适用于 R(32 位)。我已经安装了 32 和 64,但我链接到 32 位。程序找不到 DLL 并抛出 DLL not find 异常。我注意到 envPath 是空的,找不到变量。我想知道是否有人可以帮助我。
谢谢你。
static void Main(string[] args)
{
string PATH = @"c:\Users\Documents\Visual Studio 2012\Projects\ConsoleApplication1\packages\R.NET.1.5.0\lib\net40";
// Set the folder in which R.dll locates.
var envPath = Environment.GetEnvironmentVariable(PATH);
var rBinPath = @"C:\Program Files\R\R-2.15.2\bin\i386";
Environment.SetEnvironmentVariable(PATH, envPath + Path.PathSeparator + rBinPath);
using (REngine engine = REngine.CreateInstance("RDotNet"))
{
// Initializes settings.
engine.Initialize();
// .NET Framework array to R vector.
NumericVector group1 = engine.CreateNumericVector(new double[] { 30.02, 29.99, 30.11, 29.97, 30.01, 29.99 });
engine.SetSymbol("group1", group1);
// Direct parsing from R script.
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);
}
}