public static double SemTheta_Calc(double thEst, CATItems it, int[] x = null, string model = null, double[] priorPar = null, int[] parInt = null, double D = 1, string method = "BM", string priorDist = "norm")
{
double result = 0;
if (priorPar == null || priorPar.Length < 2)
{
priorPar = new double[2];
priorPar[0] = 0;
priorPar[1] = 1;
}
if (parInt == null || parInt.Length < 3)
{
parInt = new int[3];
parInt[0] = -4;
parInt[1] = 4;
parInt[2] = 33;
}
if (method == ModelNames.EstimaatorMethods.EAP.EnumToString())
{
result = EapSEM.EapSEM_Calc(thEst, it, x, model, priorPar, D, priorDist, parInt[0], parInt[1], parInt[2]);
}
else
{
if (String.IsNullOrEmpty(model)) // Dichotomous Items
{
#region "Function 'dr0' "
Func <double> dr0 = () =>
{
double res = 0;
if (method == ModelNames.EstimaatorMethods.BM.EnumToString())
{
switch (priorDist)
{
case "norm":
res = -1 / (Math.Pow(priorPar[1], 2));
break;
case "unif":
res = 0;
break;
case "Jeffreys":
IiList objIi = Ii.Ii_Calc(thEst, it, model, D);
res = (CatRcs.Utils.RowColumn.Sum(objIi.d2Ii) * CatRcs.Utils.RowColumn.Sum(objIi.Ii)
- Math.Pow(CatRcs.Utils.RowColumn.Sum(objIi.dIi), 2)) / (2 * Math.Pow(CatRcs.Utils.RowColumn.Sum(objIi.Ii), 2));
break;
}
}
else
{
if (method == ModelNames.EstimaatorMethods.ML.EnumToString() || method == ModelNames.EstimaatorMethods.WL.EnumToString())
{
res = 0;
}
}
return(res);
};
#endregion
result = 1 / Math.Sqrt(-dr0() + CatRcs.Utils.RowColumn.Sum(Ii.Ii_Calc(thEst, it, model, D).Ii));
}
else // Polytomous Items
{
double met = 0, pd = 0, optI = 0;
ModelNames.EstimaatorMethods md = ModelNames.StringToEnumMethods(method);
switch (md)
{
case ModelNames.EstimaatorMethods.ML:
met = 1;
break;
case ModelNames.EstimaatorMethods.BM:
met = 2;
break;
case ModelNames.EstimaatorMethods.WL:
met = 3;
break;
case ModelNames.EstimaatorMethods.EAP:
met = 4;
break;
}
switch (priorDist)
{
case "norm":
pd = 1;
break;
case "unif":
pd = 2;
break;
case "Jeffreys":
pd = 3;
break;
}
if (met == 1 || (met == 2 && pd == 2))
{
optI = CatRcs.Utils.RowColumn.Sum(Ii.Ii_Calc(thEst, it, model, D).Ii);
}
if (met == 2 && pd == 1)
{
optI = CatRcs.Utils.RowColumn.Sum(Ii.Ii_Calc(thEst, it, model, D).Ii) + (1 / Math.Pow(priorPar[1], 2));
}
if (met == 3 || (met == 2 && pd == 3))
{
IiList objIi = Ii.Ii_Calc(thEst, it, model, D);
if (met == 2)
{
optI = CatRcs.Utils.RowColumn.Sum(objIi.Ii) + (Math.Pow(CatRcs.Utils.RowColumn.Sum(objIi.dIi), 2) - CatRcs.Utils.RowColumn.Sum(objIi.d2Ii) *
CatRcs.Utils.RowColumn.Sum(objIi.Ii)) / (2 * Math.Pow(CatRcs.Utils.RowColumn.Sum(objIi.Ii), 2));
}
else
{
optI = CatRcs.Utils.RowColumn.Sum(objIi.Ii);
}
}
result = 1 / Math.Sqrt(optI);
}
}
return(result);
}
public static double ThetaEst_Calc(CATItems it, int[] x, string model = null, double[] priorPar = null, double[] range = null, int[] parInt = null, double D = 1, string method = "BM", string priorDist = "norm")
{
double result = 0; double[] RANGE = null;
#region "Parameter Validation"
if (priorPar == null || priorPar.Length < 2)
{
priorPar = new double[2];
priorPar[0] = 0;
priorPar[1] = 1;
}
if (range == null || range.Length < 2)
{
range = new double[2];
range[0] = -4;
range[1] = 4;
}
if (parInt == null || parInt.Length < 3)
{
parInt = new int[3];
parInt[0] = -4;
parInt[1] = 4;
parInt[2] = 33;
}
#endregion
if (method == ModelNames.EstimaatorMethods.EAP.EnumToString())
{
result = EapEST.EapEST_Calc(it, x, model, priorPar, D, priorDist, parInt[0], parInt[1], parInt[2]);
}
else
{
if (String.IsNullOrEmpty(model)) // Dichotomous Items
{
#region "Function 'r0' "
Func <double, string, double> r0 = (th, met) =>
{
double res = 0;
if (met == ModelNames.EstimaatorMethods.BM.EnumToString())
{
switch (priorDist)
{
case "norm":
res = (priorPar[0] - th) / Math.Pow(priorPar[1], 2);
break;
case "unif":
res = 0;
break;
case "Jeffreys":
IiList objIi = Ii.Ii_Calc(th, it, model, D);
res = CatRcs.Utils.RowColumn.Sum(objIi.dIi) / (2 * CatRcs.Utils.RowColumn.Sum(objIi.Ii));
break;
}
}
else
{
ModelNames.EstimaatorMethods md = ModelNames.StringToEnumMethods(met);
switch (md)
{
case ModelNames.EstimaatorMethods.ML:
res = 0;
break;
case ModelNames.EstimaatorMethods.WL:
res = CatRcs.Utils.RowColumn.Sum(Ji.Ji_Calc(th, it, model, D).Ji) / (2 * CatRcs.Utils.RowColumn.Sum(Ii.Ii_Calc(th, it, model, D).Ii));
break;
}
}
return(res);
};
#endregion
#region "Function 'r' "
Func <double, double> r = (th) =>
{
double res = 0;
double[] Q = new double[it.NumOfItems], x_p = new double[it.NumOfItems], p_q = new double[it.NumOfItems], temp = new double[it.NumOfItems];
double[] pi = Pi.Pi_Calc(th, it, model, D).Pi;
double[] dpi = Pi.Pi_Calc(th, it, model, D).dPi;
for (int ind_p = 0; ind_p < pi.Length; ind_p++)
{
Q[ind_p] = 1 - pi[ind_p];
x_p[ind_p] = x[ind_p] - pi[ind_p];
p_q[ind_p] = pi[ind_p] * Q[ind_p];
temp[ind_p] = dpi[ind_p] * (x_p[ind_p] / p_q[ind_p]);
}
res = temp.Sum();
return(res);
};
#endregion
#region "Function 'f' "
Func <double, double> f = (th) =>
{
double res = 0;
return(res);
};
if (method == ModelNames.EstimaatorMethods.BM.EnumToString() && priorDist == "unif")
{
f = (th) =>
{
double res = 0;
string methodName = ModelNames.EstimaatorMethods.ML.EnumToString();
res = r0(th, methodName) + r(th);
return(res);
};
}
else
{
f = (th) =>
{
double res = 0;
res = r0(th, method) + r(th);
return(res);
};
}
#endregion
if (method == ModelNames.EstimaatorMethods.BM.EnumToString() && priorDist == "unif")
{
RANGE = priorPar;
}
else
{
RANGE = range;
}
if (f(RANGE[0]) < 0 && f(RANGE[1]) < 0)
{
result = RANGE[0];
}
else
{
if (f(RANGE[0]) > 0 && f(RANGE[1]) > 0)
{
result = RANGE[1];
}
else
{
result = CatRcs.Utils.Maths.UniRoot(f, RANGE).root;
}
}
}
else // Polytomous Items
{
int met = 0, pd = 0;
ModelNames.EstimaatorMethods md = ModelNames.StringToEnumMethods(method);
#region "Conditional Block"
switch (md)
{
case ModelNames.EstimaatorMethods.ML:
met = 1;
break;
case ModelNames.EstimaatorMethods.BM:
met = 2;
break;
case ModelNames.EstimaatorMethods.WL:
met = 3;
break;
case ModelNames.EstimaatorMethods.EAP:
met = 4;
break;
}
switch (priorDist)
{
case "norm":
pd = 1;
break;
case "unif":
pd = 2;
break;
case "Jeffreys":
pd = 3;
break;
}
if (met == 2 && pd == 2)
{
RANGE = new double[priorPar.Length];
RANGE[0] = Math.Max(priorPar[0], range[0]);
RANGE[1] = Math.Min(priorPar[1], range[1]);
}
else
{
RANGE = range;
}
#endregion
#region "Function 'dl' "
Func <double, double> dl = (th) =>
{
double res = 0;
PiListPoly p = Pi.Pi_Poly_Calc(th, it, model, D);
double[,] pr = p.Pi;
double[,] dpr = p.dPi;
for (int i = 0; i < x.Length; i++)
{
res = res + dpr[i, x[i]] / pr[i, x[i]];
}
return(res);
};
#endregion
#region "Function 'f0' "
Func <double, double> f0 = (th) =>
{
double res = 0;
if (met == 2)
{
switch (pd.ToString())
{
case "1":
res = (priorPar[0] - th) / Math.Pow(priorPar[1], 2);
break;
case "2":
res = 0;
break;
case "3":
IiList objIi = CatRcs.Ii.Ii_Calc(th, it, model, D);
res = CatRcs.Utils.RowColumn.Sum(objIi.dIi) / (2 * CatRcs.Utils.RowColumn.Sum(objIi.Ii));
break;
}
}
else
{
switch (met.ToString())
{
case "1":
res = 0;
break;
case "2":
res = 0;
break;
case "3":
res = CatRcs.Utils.RowColumn.Sum(CatRcs.Ji.Ji_Calc(th, it, model, D).Ji) / (2 * CatRcs.Utils.RowColumn.Sum(CatRcs.Ii.Ii_Calc(th, it, model, D).Ii));
break;
}
}
return(res);
};
#endregion
#region "Function 'optF' "
Func <double, double> optF = (th) =>
{
double res = 0;
res = dl(th) + f0(th);
return(res);
};
#endregion
if (optF(RANGE[0]) < 0 && optF(RANGE[1]) < 0)
{
result = RANGE[0];
}
else
{
if (optF(RANGE[0]) > 0 && optF(RANGE[1]) > 0)
{
result = RANGE[1];
}
else
{
result = CatRcs.Utils.Maths.UniRoot(optF, RANGE).root;
}
}
}
}
return(result);
}
public static IiList Ii_Calc(double th, CATItems it, string model, double D)
{
IiList objIi = null;
double[] Ii = null; double[] dIi = null; double[] d2Ii = null;
try
{
if (String.IsNullOrEmpty(model))
{
#region "Calculation for Dichotmous Items"
double[] P = null; double[] dP = null; double[] d2P = null; double[] d3P = null;
PiList pr = Pi.Pi_Calc(th, it, model, D); // Check return value of Pi
if (pr == null)
{
objIi = new IiList();
objIi.Exception = "No Pi values found!";
return(objIi);
}
P = pr.Pi;
dP = pr.dPi;
d2P = pr.d2Pi;
d3P = pr.d3Pi;
Ii = new double[dP.Length];
dIi = new double[d2P.Length];
d2Ii = new double[d3P.Length];
objIi = new IiList(P.Length);
double[] Q = new double[P.Length];
for (int i = 0; i < P.Length; i++)
{
Q[i] = 1 - P[i];
}
for (int j = 0; j < Ii.Length; j++)
{
Ii[j] = Math.Pow(dP[j], 2) / (P[j] * Q[j]);
}
for (int k = 0; k < dIi.Length; k++)
{
dIi[k] = dP[k] * (2 * P[k] * Q[k] * d2P[k] - Math.Pow(dP[k], 2) * (Q[k] - P[k])) / (Math.Pow(P[k], 2) * Math.Pow(Q[k], 2));
}
for (int l = 0; l < d2Ii.Length; l++)
{
d2Ii[l] = (2 * P[l] * Q[l] * (Math.Pow(d2P[l], 2) + dP[l] * d3P[l]) - 2 * Math.Pow(dP[l], 2) * d2P[l] * (Q[l] - P[l])) / (Math.Pow(P[l], 2) * Math.Pow(Q[l], 2)) -
(3 * Math.Pow(P[l], 2) * Q[l] * Math.Pow(dP[l], 2) * d2P[l] - P[l] * Math.Pow(dP[l], 4) * (2 * Q[l] - P[l])) / (Math.Pow(P[l], 4) * Math.Pow(Q[l], 2)) +
(3 * P[l] * Math.Pow(Q[l], 2) * Math.Pow(dP[l], 2) * d2P[l] - Q[l] * Math.Pow(dP[l], 4) * (Q[l] - 2 * P[l])) / (Math.Pow(P[l], 2) * Math.Pow(Q[l], 4));
}
#endregion
}
else
{
#region "Calculation for Polytomous Items"
double[,] P = null; double[,] dP = null; double[,] d2P = null; double[,] d3P = null;
PiListPoly pr = Pi.Pi_Poly_Calc(th, it, model, D);
if (pr == null)
{
objIi = new IiList();
objIi.Exception = "No Pi values found!";
return(objIi);
}
P = pr.Pi;
dP = pr.dPi;
d2P = pr.d2Pi;
d3P = pr.d3Pi;
int rowLength = pr.Pi.GetLength(0);
int columnLength = pr.Pi.GetLength(1);
objIi = new IiList(rowLength);
double[,] pr0 = new double[rowLength, columnLength];
double[,] pr1 = new double[rowLength, columnLength];
double[,] pr2 = new double[rowLength, columnLength];
Ii = new double[rowLength];
dIi = new double[rowLength];
d2Ii = new double[rowLength];
for (int i = 0; i < rowLength; i++)
{
for (int j = 0; j < columnLength; j++)
{
pr0[i, j] = Math.Pow(dP[i, j], 2) / P[i, j];
pr1[i, j] = 2 * dP[i, j] * (d2P[i, j] / P[i, j]) - (Math.Pow(dP[i, j], 3) / Math.Pow(P[i, j], 2));
pr2[i, j] = (2 * Math.Pow(d2P[i, j], 2) + 2 * dP[i, j] * d3P[i, j]) / P[i, j] - 2 * Math.Pow(dP[i, j], 2) * (d2P[i, j] / -3) * dP[i, j] * (d2P[i, j] / Math.Pow(P[i, j], 2)) + 2 * (Math.Pow(dP[i, j], 4) / Math.Pow(P[i, j], 3));
}
}
Ii = RowColumn.rowSums(pr0);
dIi = RowColumn.rowSums(pr1);
d2Ii = RowColumn.rowSums(pr2);
#endregion
}
objIi.Add(Ii, dIi, d2Ii);
}
catch (Exception ex)
{
if (ex != null)
{
if (objIi == null)
{
objIi = new IiList();
}
objIi.Exception = ex.Message;
}
return(objIi);
}
return(objIi);
}
public void testIi_P(ModelNames.Models paramModel)
{
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(10, 5, model = modelName, same.nrCat = FALSE)").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(NumOfItems: PolyItems[0].Length, model: paramModel.EnumToString(), same_nrCat: false, nrCat: 5);
for (int i = 0; i < itemBank.colSize; i++)
{
itemBank.all_items_poly[i] = PolyItems[i].Select(y => (double)y).ToArray();
}
for (int j = 0; j < itemBank.colSize; j++)
{
for (int k = 0; k < itemBank.NumOfItems; k++)
{
if (CatRcs.Utils.CheckNaValues.IsNaNvalue(itemBank.all_items_poly[j][k]))
{
itemBank.all_items_poly[j][k] = double.NaN;
}
}
}
#region "Test block for Ability Values (th)"
IiList objIi = null;
int decimalPoint = 6;
double[] th_Values = CatRcs.Utils.CommonHelper.Sequence(-4, 4, by: 1);
Console.WriteLine("******* TEST for Ability value Theta ********");
for (int k = 0; k < th_Values.Length; k++)
{
// Sequence Generation for Theta (Ability) values
NumericVector th_val = engineObj.CreateNumericVector(new double[] { th_Values[k] });
engineObj.SetSymbol("th_val", th_val);
// Calling the Ii function from R
GenericVector result_Ii = engineObj.Evaluate("result_Ii <- Ii(th = th_val, PolyItems, model = modelName, D = 1)").AsList();
// Getting the function result
NumericVector Ii = result_Ii[0].AsNumeric();
NumericVector dIi = result_Ii[1].AsNumeric();
NumericVector d2Ii = result_Ii[2].AsNumeric();
Console.WriteLine("Value of Theta: " + th_Values[k]);
objIi = CatRLib.Ii(th_Values[k], itemBank, paramModel.EnumToString(), 1);
#region "Ii"
int z = 0;
resultFlag = true;
Console.WriteLine("****** Ii ******");
for (int i = 0; i < objIi.Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.Ii[i]), decimalPoint))
{
Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of Ii result is Passed!");
#endregion
#region "dIi"
z = 0;
resultFlag = true;
Console.WriteLine("****** dIi ******");
for (int i = 0; i < objIi.dIi.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(dIi[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.dIi[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of dIi result is Passed!");
#endregion
#region "d2Ii"
z = 0;
resultFlag = true;
Console.WriteLine("****** d2Ii ******");
for (int i = 0; i < objIi.d2Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(d2Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.d2Ii[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of d2Ii result is Passed!");
#endregion
}
#endregion
#region "Test block for Metric values"
objIi = null;
double[] D_Values = CatRcs.Utils.CommonHelper.Sequence(0.5, 1, by: 0.1);
Console.WriteLine("******* TEST for Metric Constant ********");
for (int k = 0; k < D_Values.Length; k++)
{
// Sequence Generation for Metric values
NumericVector D_val = engineObj.CreateNumericVector(new double[] { D_Values[k] });
engineObj.SetSymbol("D_val", D_val);
// Calling the Ii function from R
GenericVector result_Ii = engineObj.Evaluate("result_Ii <- Ii(th = 0, PolyItems, model = modelName, D = D_val)").AsList();
// Getting the function result
NumericVector Ii = result_Ii[0].AsNumeric();
NumericVector dIi = result_Ii[1].AsNumeric();
NumericVector d2Ii = result_Ii[2].AsNumeric();
Console.WriteLine("Value of Metric Constant: " + D_Values[k]);
objIi = CatRLib.Ii(0, itemBank, paramModel.EnumToString(), D_Values[k]);
#region "Ii"
int z = 0;
resultFlag = true;
Console.WriteLine("****** Ii ******");
for (int i = 0; i < objIi.Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.Ii[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of Ii result is Passed!");
#endregion
#region "dIi"
z = 0;
resultFlag = true;
Console.WriteLine("****** dIi ******");
for (int i = 0; i < objIi.dIi.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(dIi[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.dIi[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of dIi result is Passed!");
#endregion
#region "d2Ii"
z = 0;
resultFlag = true;
Console.WriteLine("****** d2Ii ******");
for (int i = 0; i < objIi.d2Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(d2Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.d2Ii[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of d2Ii result is Passed!");
#endregion
}
#endregion
}
public void testIi_D()
{
REngine.SetEnvironmentVariables();
REngine engineObj = REngine.GetInstance();
// Loading a library from R
engineObj.Evaluate("library(catR)");
// Dichotomous Items
DataFrame DichoItems = engineObj.Evaluate("DichoItems <- genDichoMatrix(items = 10)").AsDataFrame();
engineObj.SetSymbol("DichoItems", DichoItems);
// Adapting with the existing "CAT-Items" type (Wrapper)
CATItems itemBank = new CATItems(DichoItems[0].Length, false);
// New Dictionary
itemBank.SetItemParamter(CATItems.ColumnNames.a, DichoItems[0].Select(y => (double)y).ToArray());
itemBank.SetItemParamter(CATItems.ColumnNames.b, DichoItems[1].Select(y => (double)y).ToArray());
itemBank.SetItemParamter(CATItems.ColumnNames.c, DichoItems[2].Select(y => (double)y).ToArray());
itemBank.SetItemParamter(CATItems.ColumnNames.d, DichoItems[3].Select(y => (double)y).ToArray());
#region "Test block for Ability Values (th)"
IiList objIi = null;
int decimalPoint = 6;
double[] th_Values = CatRcs.Utils.CommonHelper.Sequence(-4, 4, by: 1);
Console.WriteLine("******* TEST for Ability value Theta ********");
for (int k = 0; k < th_Values.Length; k++)
{
// Sequence Generation for Theta (Ability) values
NumericVector th_val = engineObj.CreateNumericVector(new double[] { th_Values[k] });
engineObj.SetSymbol("th_val", th_val);
// Calling the Ii function from R
GenericVector result_Ii = engineObj.Evaluate("result_Ii <- Ii(th = th_val, DichoItems)").AsList();
// Getting the function result
NumericVector Ii = result_Ii[0].AsNumeric();
NumericVector dIi = result_Ii[1].AsNumeric();
NumericVector d2Ii = result_Ii[2].AsNumeric();
Console.WriteLine("Value of Theta: " + th_Values[k]);
objIi = CatRLib.Ii(th_Values[k], itemBank, "", 1);
#region "Ii"
int z = 0;
resultFlag = true;
Console.WriteLine("****** Ii ******");
for (int i = 0; i < objIi.Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.Ii[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of Ii result is Passed!");
#endregion
#region "dIi"
z = 0;
resultFlag = true;
Console.WriteLine("****** dIi ******");
for (int i = 0; i < objIi.dIi.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(dIi[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.dIi[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of dIi result is Passed!");
#endregion
#region "d2Ii"
z = 0;
resultFlag = true;
Console.WriteLine("****** d2Ii ******");
for (int i = 0; i < objIi.d2Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(d2Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.d2Ii[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of d2Ii result is Passed!");
#endregion
}
#endregion
#region "Test block for Metric values"
objIi = null;
double[] D_Values = CatRcs.Utils.CommonHelper.Sequence(0.5, 1, by: 0.1);
Console.WriteLine("******* TEST for Metric Constant ********");
for (int k = 0; k < D_Values.Length; k++)
{
// Sequence Generation for Theta (Ability) values
NumericVector D_val = engineObj.CreateNumericVector(new double[] { D_Values[k] });
engineObj.SetSymbol("D_val", D_val);
// Calling the Ii function from R
GenericVector result_Ii = engineObj.Evaluate("result_Ii <- Ii(th = 0, DichoItems, D = D_val)").AsList();
// Getting the function result
NumericVector Ii = result_Ii[0].AsNumeric();
NumericVector dIi = result_Ii[1].AsNumeric();
NumericVector d2Ii = result_Ii[2].AsNumeric();
Console.WriteLine("Value of Metric Constant: " + D_Values[k]);
objIi = CatRLib.Ii(0, itemBank, "", D_Values[k]);
#region "Ii"
int z = 0;
resultFlag = true;
Console.WriteLine("****** Ii ******");
for (int i = 0; i < objIi.Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.Ii[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of Ii result is Passed!");
#endregion
#region "dIi"
z = 0;
resultFlag = true;
Console.WriteLine("****** dIi ******");
for (int i = 0; i < objIi.dIi.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(dIi[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.dIi[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of dIi result is Passed!");
#endregion
#region "d2Ii"
z = 0;
resultFlag = true;
Console.WriteLine("****** d2Ii ******");
for (int i = 0; i < objIi.d2Ii.Length; i++)
{
z = i + 1; // item number
if (decimal.Round(Convert.ToDecimal(d2Ii[i]), decimalPoint) != decimal.Round(Convert.ToDecimal(objIi.d2Ii[i]), decimalPoint))
{
//Console.WriteLine("Test for Item No. # " + z + " is not Passed!");
resultFlag = false;
}
}
Assert.IsTrue(resultFlag);
Console.WriteLine("Values of d2Ii result is Passed!");
#endregion
}
#endregion
}
// Function "Ii"
public static IiList Ii(double th, CATItems it, string model, double D)
{
IiList objIi = CatRcs.Ii.Ii_Calc(th, it, model, D);
return(objIi);
}
