我在尝试将R.NET与track包一起使用时遇到同样的问题(它需要跟踪变量,这些变量是通过R代码运行修改的)。
所以,它本机R代码,工作正常:
library(track);
track.start(clobber = "vars", dir = file.path(tempdir(), 'rdata123'));
a <- 5;
print(track.summary());
print(ls(globalenv()));
track.stop();
我有这样的输出:
> library(track);
> track.start(clobber = "vars", dir = file.path(tempdir(), 'rdata123'));
Tracking <env R_GlobalEnv> (writable) using existing directory 'C:\Users\Rebelion\AppData\Local\Temp\RtmpGmyc4B/rdata123'
>
> a <- 5;
> print(track.summary());
class mode extent length size modified TA TW
a numeric numeric [1] 1 48 2015-11-19 10:44:34 0 2
> print(ls(globalenv()));
[1] "a"
>
> track.stop();
Stopping tracking on <env R_GlobalEnv>
因此,当我尝试通过R.NET实现补充代码时(参见下面的代码)
using System;
using RDotNet;
namespace ConsoleApplication10
{
class Program
{
static void Main(string[] args)
{
REngine.SetEnvironmentVariables();
var engine = REngine.GetInstance();
engine.Initialize();
engine.Evaluate("library(track);");
engine.Evaluate(@"track.start(auto = TRUE, clobber = ""vars"", dir = file.path(tempdir(), 'rdatadir123456'))");
engine.Evaluate("a <- 5;");
engine.Evaluate("print(track.summary());");
engine.Evaluate("print(ls(globalenv()));");
engine.Evaluate("track.stop();");
Console.ReadLine();
}
}
}
我有另一个输出,其中track.summary()不包含任何内容:
Tracking <env R_GlobalEnv> (writable) using new directory 'C:\Users\Rebelion\AppData\Local\Temp\RtmpiQEGgY/rdatadir123456'
[1] class mode extent length size modified TA TW
<0 строк> (или 'row.names' нулевой длины)
[1] "a"
Stopping tracking on <env R_GlobalEnv>
是什么原因,有人知道吗? 谢谢。