这适用于 R.NET 1.6.5 并输出:
没有像 CreateCharacterMatrix 期望的那样找到将 DataTable 转换为 string[,] 的好方法,但 CreateDataFrame 是另一种可能性,但它需要一个 IEnumerable[] 并且是面向列的(就像 R 中的 data.frame 一样)。
通过源代码中的测试可能会有所帮助:
https ://github.com/jmp75/rdotnet/tree/master/RDotNet.Tests
还有这个:https ://github.com/jmp75/rdotnet-onboarding
这在某些方面更有帮助,因为官方文档很少:
https ://jmp75.github.io/rdotnet/getting_started/
using System;
using System.Data;
using RDotNet;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
DataTable dtb = new DataTable();
dtb.Columns.Add("Column1", Type.GetType("System.String"));
dtb.Columns.Add("Column2", Type.GetType("System.String"));
DataRow dtr1 = dtb.NewRow();
dtr1[0] = "abc";
dtr1[1] = "cdf";
dtb.Rows.Add(dtr1);
DataRow dtr2 = dtb.NewRow();
dtr2[0] = "asdasd";
dtr2[1] = "cdasdasf";
dtb.Rows.Add(dtr2);
using (var engine = REngine.GetInstance())
{
string[,] stringData = new string[dtb.Rows.Count, dtb.Columns.Count];
for (int row = 0; row < dtb.Rows.Count; row++)
{
for (int col = 0; col < dtb.Columns.Count; col++)
{
stringData[row, col] = dtb.Rows[row].ItemArray[col].ToString();
}
}
CharacterMatrix matrix = engine.CreateCharacterMatrix(stringData);
engine.SetSymbol("myRDataFrame", matrix);
engine.Evaluate("myRDataFrame <- as.data.frame(myRDataFrame, stringsAsFactors = FALSE)");
engine.Evaluate("str(myRDataFrame)");
}
Console.ReadKey();
}
}
}