private MatrixVal[,] PerkalianMatrix(MatrixVal[,] value, int c, int r)
{
MatrixVal[,] MatrixPerkalian = new MatrixVal[c, r];
for (var x = 0; x < c; x++)
{
for (var y = 0; y < r; y++)
{
decimal result = 0;
for (var k = 0; k < r; k++)
{
result = result + Math.Round((value[x, k].Nilai * value[k, y].Nilai) + 0.0000m, 4, MidpointRounding.ToEven);
}
var cell = new MatrixVal();
cell.Kode1 = value[x, y].Kode1;
cell.Kode2 = value[x, y].Kode2;
cell.Nilai = Math.Round(result + 0.0000m, 4, MidpointRounding.ToEven);
MatrixPerkalian[x, y] = cell;
}
}
return(MatrixPerkalian);
}
public Matrix Create(List <SpPerbandinganKriteria_Result> model)
{
var matrix = new Matrix();
matrix.Kriterias = base.ctx.Set <Kriteria>().OrderBy(x => x.Kode).ToList();
List <MatrixVal> arr = new List <MatrixVal>();
int idxR, idxC, r, c = matrix.Kriterias.Count();
r = c;
idxC = 0;
MatrixVal[,] MatrixValue = new MatrixVal[c, r];
foreach (var kriteria in matrix.Kriterias)
{
idxR = 0;
foreach (var item in model.Where(x => x.Kode1.Equals(kriteria.Kode)))
{
var matrixVal = new MatrixVal();
matrixVal.Kode1 = item.Kode1;
matrixVal.Kode2 = item.Kode2;
matrixVal.Nilai = Math.Round(((decimal)item.Nilai1 / (decimal)item.nilai2) + 0.0000m, 4, MidpointRounding.ToEven);
MatrixValue[idxC, idxR] = matrixVal;
arr.Add(matrixVal);
idxR++;
}
idxC++;
}
matrix.PerbandinganKriteria = arr;
matrix.MatrixPerbandingan = MatrixValue;
var matrixPerkalian = PerkalianMatrix(MatrixValue, c, r);
matrix.MatrixPerkalian = matrixPerkalian;
matrix.EigenVector = CalEigenVector(matrixPerkalian, c, r);
foreach (var item in model)
{
var perbandinganKriteria = base.ctx.Set <PerbandinganKriteria>().SingleOrDefault(
x => x.Kode == item.Kode1 && x.Kode2 == item.Kode2);
if (perbandinganKriteria == null)
{
perbandinganKriteria = new PerbandinganKriteria();
perbandinganKriteria.Kode = (int)item.Kode1;
perbandinganKriteria.Kode2 = (int)item.Kode2;
perbandinganKriteria.Nilai = item.Nilai1;
perbandinganKriteria.Nilai2 = item.nilai2;
base.ctx.Set <PerbandinganKriteria>().Add(perbandinganKriteria);
}
perbandinganKriteria.Kode = (int)item.Kode1;
perbandinganKriteria.Kode2 = (int)item.Kode2;
perbandinganKriteria.Nilai = item.Nilai1;
perbandinganKriteria.Nilai2 = item.nilai2;
}
foreach (var krit in matrix.Kriterias)
{
var e = matrix.EigenVector.SingleOrDefault(u => u.Kode == krit.Kode);
if (e != null)
{
krit.EigenvectorScore = (double)e.Nilai;
}
}
var rest = base.ctx.SaveChanges() > 0;
return(matrix);
}
