static void Main(string[] args)
{
// Init R session
IRHostSession session = RHostSession.Create("Test");
Task sessionStartTask = session.StartHostAsync(new RHostSessionCallback());
sessionStartTask.Wait();
// Simple output from console
Console.WriteLine("Arbitrary R code:");
var result = session.ExecuteAndOutputAsync("Sys.info()");
result.Wait();
Console.WriteLine(result.Result.Output);
// Create R DataFrame
List <string> colNames = new List <string>(new string[] { "c1", "c2" });
List <string> rowNames = new List <string>(new string[] { "1", "2", "3", "10" });
var xx = new object[] { new object[] { 1, 3, 43, 54 }, new object[] { "a", "c", "a", "d" } };
var list = new List <IReadOnlyCollection <object> >();
foreach (object o in xx)
{
list.Add(o as object[]);
}
DataFrame df = new DataFrame(rowNames, colNames, list.AsReadOnly());
var dtc = session.CreateDataFrameAsync("data", df);
dtc.Wait();
// Print data frame in R session
result = session.ExecuteAndOutputAsync("print(data)");
result.Wait();
Console.WriteLine("\nR data frame:");
Console.WriteLine(result.Result.Output);
var resultList = session.GetListAsync("list(mean(data$c1), 111)");
Console.WriteLine("\nList elements returned from R to C#:");
Console.WriteLine(Convert.ToDouble(resultList.Result[0]) * 100);
Console.WriteLine(resultList.Result[1]);
session.StopHostAsync();
Console.ReadLine();
}
public async Task CreateDataFrame(string[] rowNames, string[] colNames, object[] data)
{
var list = new List <IReadOnlyCollection <object> >();
foreach (object o in data)
{
list.Add(o as object[]);
}
var original = new DataFrame(rowNames, colNames, list.AsReadOnly());
await _session.CreateDataFrameAsync("x", original);
var rdf = await _session.GetDataFrameAsync("x");
rdf.RowNames.Should().HaveCount(rowNames.Length).And.ContainInOrder(rowNames);
rdf.ColumnNames.Should().HaveCount(colNames.Length).And.ContainInOrder(colNames);
rdf.Data.Should().HaveCount(colNames.Length);
rdf.Data.First().Should().HaveCount(rowNames.Length).And.ContainInOrder(data[0] as object[]);
}
public async Task CreateDataFrameAsync(string name, DataFrame dataFrame)
{
//logger.Log("Creating DataFrame: "+name, Category.Info, Priority.None);
await rHostSession.CreateDataFrameAsync(name, dataFrame);
}