以编程方式执行R脚本

Question

我有一个C#程序生成一些R代码.现在我将脚本保存到文件,然后将其复制/粘贴到R控制台.我知道有一个到R的COM接口,但它似乎不适用于最新版本的R(或2.7.8之后的任何版本).有没有什么方法可以在将其保存到文件后以编程方式从C#执行R脚本？

Answer 1

这是我最近为此目的写的课程.您还可以从C#和R传入并返回参数:

/// <summary>
/// This class runs R code from a file using the console.
/// </summary>
public class RScriptRunner
{
    /// <summary>
    /// Runs an R script from a file using Rscript.exe.
    /// Example:  
    ///   RScriptRunner.RunFromCmd(curDirectory + @"\ImageClustering.r", "rscript.exe", curDirectory.Replace('\\','/'));
    /// Getting args passed from C# using R:
    ///   args = commandArgs(trailingOnly = TRUE)
    ///   print(args[1]);
    /// </summary>
    /// <param name="rCodeFilePath">File where your R code is located.</param>
    /// <param name="rScriptExecutablePath">Usually only requires "rscript.exe"</param>
    /// <param name="args">Multiple R args can be seperated by spaces.</param>
    /// <returns>Returns a string with the R responses.</returns>
    public static string RunFromCmd(string rCodeFilePath, string rScriptExecutablePath, string args)
    {
            string file = rCodeFilePath;
            string result = string.Empty;

            try
            {

                var info = new ProcessStartInfo();
                info.FileName = rScriptExecutablePath;
                info.WorkingDirectory = Path.GetDirectoryName(rScriptExecutablePath);
                info.Arguments = rCodeFilePath + " " + args;

                info.RedirectStandardInput = false;
                info.RedirectStandardOutput = true;
                info.UseShellExecute = false;
                info.CreateNoWindow = true;

                using (var proc = new Process())
                {
                    proc.StartInfo = info;
                    proc.Start();
                    result = proc.StandardOutput.ReadToEnd();
                }

                return result;
            }
            catch (Exception ex)
            {
                throw new Exception("R Script failed: " + result, ex);
            }
    }
}

注意:如果您对清理过程感兴趣,可能需要将以下内容添加到代码中.

proc.CloseMainWindow(); proc.Close();

Answer 2

要做到这一点,C#你需要使用

shell (R CMD BATCH myRprogram.R)

一定要像这样包裹你的情节

pdf(file="myoutput.pdf")
plot (x,y)
dev.off()

或图像包装