public void testEPV_P(int NumOfItems, ModelNames.Models paramModel)
{
resultFlag = true;
REngine.SetEnvironmentVariables();
REngine engineObj = REngine.GetInstance();
// Loading a library from R
engineObj.Evaluate("library(catR)");
// Polytomous Items
CharacterVector modelName = engineObj.CreateCharacterVector(new string[] { paramModel.EnumToString() });
engineObj.SetSymbol("modelName", modelName);
DataFrame PolyItems = engineObj.Evaluate("PolyItems <- genPolyMatrix(" + NumOfItems + ", 5, model = modelName, same.nrCat = TRUE)").AsDataFrame();
engineObj.SetSymbol("PolyItems", PolyItems);
// Adapting with the existing "CAT-Items" type (Wrapper)
Console.WriteLine("*******************************************");
Console.WriteLine("Polytomous Items, Model : " + paramModel.EnumToString());
Console.WriteLine("*******************************************");
CATItems itemBank = new CATItems(PolyItems[0].Length, paramModel.EnumToString(), 5);
Tuple <CATItems.ColumnNames, int>[] cols = itemBank.GetKeys();
for (int i = 0; i < cols.Length; i++)
{
itemBank.SetItemParamter(cols[i], PolyItems[i].Select(y => (double)y).ToArray());
}
#region "Test block for Ability Values (th)"
double[] th = CatRcs.Utils.CommonHelper.Sequence(-6, 6, length: 11);
for (int j = 0; j < th.Length; j++)
{
string temp = th[j].ToString(nfi);
// Polytomous Items
DataFrame it_given_R = engineObj.Evaluate("it_given_R <- PolyItems[c(4, 8),]").AsDataFrame();
engineObj.SetSymbol("it_given_R", it_given_R);
//Creation of a response pattern for theta value
engineObj.Evaluate("set.seed(1)");
NumericVector x_val = engineObj.Evaluate("x_val <- genPattern(" + th[j].ToString(nfi) + ", it_given_R, model = modelName)").AsNumeric();
engineObj.SetSymbol("x_val", x_val);
int[] x = x_val.Select(y => (int)y).ToArray();
CATItems it_given = itemBank.FindItem(new int[] { 4, 8 });
// Call "EPV" function from R
NumericVector r_epv = engineObj.Evaluate("r_epv <- EPV(PolyItems, 1, x_val, " + th[j].ToString(nfi) + ", it_given_R, model = modelName)").AsNumeric();
// Call "EPV" function from CatRCS
double cs_epv = CatRLib.EPV(itemBank, 1, x, th[j], it_given, paramModel.EnumToString());
if (r_epv[0] - cs_epv > testEpsilon)
{
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
#endregion
}
public void testEPV_D()
{
resultFlag = true;
REngine.SetEnvironmentVariables();
REngine engineObj = REngine.GetInstance();
// Loading a library from R
engineObj.Evaluate("library(catR)");
// Dichotomous Items
DataFrame DichoItems = engineObj.Evaluate("DichoItems <- genDichoMatrix(items = 200)").AsDataFrame();
engineObj.SetSymbol("DichoItems", DichoItems);
// Adapting with the existing "CAT-Items" type (Wrapper)
CATItems itemBank = new CATItems(DichoItems[0].Select(y => (double)y).ToArray(), DichoItems[1].Select(y => (double)y).ToArray(),
DichoItems[2].Select(y => (double)y).ToArray(), DichoItems[3].Select(y => (double)y).ToArray());
// test for different theta values
double[] th = CatRcs.Utils.CommonHelper.Sequence(-6, 6, length: 11);
var stopwatch = new Stopwatch();
stopwatch.Restart();
for (int t = 0; t < th.Length; t++)
{
string temp = th[t].ToString(nfi);
// Dichotomous Items
DataFrame it_given_R = engineObj.Evaluate("it_given_R <- DichoItems[c(4, 8),]").AsDataFrame();
engineObj.SetSymbol("it_given_R", it_given_R);
//Creation of a response pattern for theta value
engineObj.Evaluate("set.seed(1)");
NumericVector x_val = engineObj.Evaluate("x_val <- genPattern(" + th[t].ToString(nfi) + ", it_given_R)").AsNumeric();
engineObj.SetSymbol("x_val", x_val);
int[] x = x_val.Select(y => (int)y).ToArray();
int[] index = new int[] { 4, 8 };
CATItems it_given = new CATItems(index.Length); // itemBank.FindItem(new int[] { 4, 8 });
for (int i = 0; i < index.Length; i++)
{
it_given.a[i] = itemBank.a[index[i] - 1];
it_given.b[i] = itemBank.b[index[i] - 1];
it_given.c[i] = itemBank.c[index[i] - 1];
it_given.d[i] = itemBank.d[index[i] - 1];
}
// Call "EPV" function from R
NumericVector r_epv = engineObj.Evaluate("r_epv <- EPV(DichoItems, 1, x_val, " + th[t].ToString(nfi) + ", it_given_R)").AsNumeric();
stopwatch.Restart();
// Call "EPV" function from CatRCS
double cs_epv = CatRLib.EPV(itemBank, 1, x, th[t], it_given, "");
Console.WriteLine("Time taken: " + stopwatch.ElapsedMilliseconds);
if (r_epv[0] - cs_epv > testEpsilon)
{
resultFlag = false;
}
Console.WriteLine(r_epv[0] + " " + cs_epv);
}
Assert.IsTrue(resultFlag);
}
