C# R语言开发环境

R语言开发环境准备：

1:VS2012 和R语言安装包，我用的是R-3.3.0版本。注意在安装R语言时尽量将其安装在C盘同时安装路径中最好不要包含汉字。我的安装路径："C:\Program Files\R\R-3.3.0。

2：在VS中新建工程。注意工程的.NET版本要在4.0以上。

R语言VS开发配置：

1：先在开发的工程中加入NuGet的R语言包，如下图操作：

 

点击红色区域，然后在弹出的页面中查找R.Net安装即可，如下图所示：

 

安装完成后即可进行开发设置。

2：在开发调用R语言时，程序需要指定R语言的Bin路径，具体代码如下：

        public static void SetupPath()

        {

            var oldPath = System.Environment.GetEnvironmentVariable("PATH"); /////C:\Program Files\R\R-3.3.0\bin

            var rPath = System.Environment.Is64BitProcess ? @"C:\Program Files\R\R-3.3.0\bin\x64" : @"C:\Program Files\R\R-3.3.0\bin\i386";

            // Mac OS X

            //var rPath = "/Library/Frameworks/R.framework/Libraries";

            // Linux (in case of libR.so exists in the directory)

            //var rPath = "/usr/lib";

            if (Directory.Exists(rPath) == false)

                throw new DirectoryNotFoundException(string.Format("Could not found the specified path to the directory containing R.dll: {0}", rPath));

            var newPath = string.Format("{0}{1}{2}", rPath, System.IO.Path.PathSeparator, oldPath);

            System.Environment.SetEnvironmentVariable("PATH", newPath);

            // NOTE: you may need to set up R_HOME manually also on some machines

            string rHome = "";

            var platform = Environment.OSVersion.Platform;

            switch (platform)

            {

                case PlatformID.Win32NT:

                    break; // R on Windows seems to have a way to deduce its R_HOME if its R.dll is in the PATH

                case PlatformID.MacOSX:

                    rHome = "/Library/Frameworks/R.framework/Resources";

                    break;

                case PlatformID.Unix:

                    rHome = "/usr/lib/R";

                    break;

                default:

                    throw new NotSupportedException(platform.ToString());

            }

            if (!string.IsNullOrEmpty(rHome))

                Environment.SetEnvironmentVariable("R_HOME", rHome);

        }

注意图中加粗的程序代码，此处一定要写上你本地对应的R语言安装的Bin路径。

     3：在设置完路径后可以调用开发了，其中可以调用R语言脚本，和函数，如下代码片段：

SetupPath(); //设置代码路径

            using (REngine engine = REngine.GetInstance())

            {

                engine.Initialize(); // required since v1.5

                 /////////××××××此处为写小代码直接运行

                CharacterVector charVec = engine.CreateCharacterVector(new[] { "Hello, R world!, .NET speaking" });

                engine.SetSymbol("greetings", charVec);

                engine.Evaluate("str(greetings)"); // print out in the console

                string[] a = engine.Evaluate("'Hi there .NET, from the R engine'").AsCharacter().ToArray();

                //////////××××××××结束

///××××××××直接进行调用脚本进行计算                engine.Evaluate("source('c:/testForR/test.R')");

                string[] b = engine.Evaluate("source('c:/testForR/test2.R')").AsCharacter().ToArray();/////参数为脚本的存放地址

                string str1 = "llq.p1<-"+b[0];

                engine.Evaluate(str1);

                string str2 = "print(llq.p1[4])";

                string[] c = engine.Evaluate(str2).AsCharacter().ToArray();

                                     /////×××××调用脚本结束

               //// txtR.Text = c[0];

            }

 

附录：

参考url 1：http://f.dataguru.cn/thread-229918-1-1.html

参考url2：http://www.yiibai.com/r/r_environment_setup.html

参考url3：http://rdotnet.codeplex.com/documentation