访问和提取数据框结果-R.NET

Question

I run a R script from C# and get the results in a dataframe as :

var OUTPUT = engine.GetSymbol("detail.dt").AsDataFrame();

OUTPUT dataframe has let's say 3 columns as:

NAME Month Rate 

Rob 1 100

Rob 2 150

Rob 3 500

Ned 1 200

Ned 2 500

Sansa 1 500

Sansa 2 1000

I can extract individual column values as :

var Name = OUTPUT[0].AsEnumerable().ToList();
var Month = OUTPUT[1].AsNumeric().ToList();
var Rate = OUTPUT[2].AsNumeric().ToList();

My question is instead of extracting column by column values, I basically want to extract Month and Rate if user asks for " Rob " or " Sansa ". How do I extract Month and Rate values for a given Name ? Is there a better and faster way?

Answer 1

I would loop through the data.frame. Name appears to be duplicated in your data, but here's how you can get one of them:

string userInput = "Rob";
int myMonth = 0;
int myRate = 0;

for (int i = 0; i < OUTPUT.RowCount; ++i)
{
  if (OUTPUT[i, 0].ToString() == userInput) {
    myMonth = Convert.ToInt32(OUTPUT[i, 1].ToString());
    myRate = Convert.ToInt32(OUTPUT[i, 2].ToString());
    break;
  }
}

If you need all of them, get rid of the break statement, and pile them into a list or whatever data structure that suits you.