/// <summary>
/// This is the first step of incidence matrix method. This function performs the operation described in chapter3.2.1 in [1]
/// </summary>
/// <param name="IM"></param>
/// <param name="Noutvalr"></param>
/// <param name="Noutvalc"></param>
/// <param name="Activat"></param>
private static void IncidenceMatrixFirstStep(IncidenceMatrix IM, double[] Noutvalr, double[] Noutvalc, bool Activat)
{
IncidenceMatrix IMstart;
do
{
IMstart = IncidenceMatrix.Build.DenseOfMatrix(IM);
var locations = IM.FindLocations(ANY);
foreach ((int row, int col) in locations)
{
double currentValr = IM.Row(row).MultiplyNonZeroVector();
double currentValc = IM.Column(col).MultiplyNonZeroVector();
// Coefficients in equations (1) to (4) in reference [1]
double Cvalr = Noutvalr[row] / currentValr;
double Cvalc = Noutvalc[col] / currentValc;
//checking for rows
double R2 = Log(Cvalr) / Log(IN);
double R3 = Log(Cvalr) / Log(OUT);
double C2 = Log(Cvalc) / Log(IN);
double C3 = Log(Cvalc) / Log(OUT);
if (IsInteger(R2) && !IsInteger(C3)) // D1 in Fig. 1
{
IM[row, col] = IN;
}
else if (IsInteger(R3) && !IsInteger(C2)) // D2 in Fig. 1
{
IM[row, col] = OUT;
}
else if (IsInteger(C2) && !IsInteger(R3)) // D3 in Fig. 1
{
IM[row, col] = IN;
}
else if (IsInteger(C3) && !IsInteger(R2))
{
if (!Activat && (IM.Column(col).FindAnyValue() > 1))
{
IM[row, col] = OUT;
}
else if (Activat)
{
IM[row, col] = OUT;
}
}
}
} while (!IMstart.Equals(IM));
}
/// <summary>
/// Converts an incidence matrix to design structure matrix.
/// </summary>
/// <param name="IM"></param>
/// <returns></returns>
public static DesignStructureMatrix IncidenceMatrixToDesignStructureMatrix(IncidenceMatrix IM)
{
DesignStructureMatrix DSM = IncidenceMatrix.Build.DenseIdentity(IM.RowCount, IM.RowCount);
List <(int i, int j)> locRowCol = IM.FindLocations(LibishScheduler.OUT);
foreach ((int row, int col) in locRowCol)
{
List <int> inputLocaltions = IM.Column(col).FindLocations(LibishScheduler.IN);
if (inputLocaltions != null)
{
foreach (int i in inputLocaltions)
{
DSM[row, i] = LibishScheduler.ANY;
}
}
}
return(DSM);
}
/// <summary>
/// This function adds additional varaibles as indpendent varaibles. This is done when the system is underdetermined and
/// additional variables are required to solve it.
/// </summary>
/// <param name="IM"></param>
/// <param name="Noutvalr"></param>
/// <param name="Noutvalc"></param>
private static void FillAsInput(IncidenceMatrix IM, double[] Noutvalr, double[] Noutvalc)
{
List <(int i, int j)> locations = IM.FindLocations(ANY);
foreach ((int row, int col) in locations)
{
//% fills the ANYs with IN if IN has to be put in row and in column
//% this make the variable in the column to be an input
double currentValr = IM.Row(row).MultiplyNonZeroVector();
double currentValc = IM.Column(col).MultiplyNonZeroVector();
// Coefficients in equations (1) to (4) in reference [1]
double Cvalr = Noutvalr[row] / currentValr;
double Cvalc = Noutvalc[col] / currentValc;
//checking for rows
double R2 = Log(Cvalr) / Log(IN);
double C3 = Log(Cvalc) / Log(OUT);
if (IsInteger(R2) && IsInteger(C3)) // D1 in Fig. 1
{
IM[row, col] = IN;
}
}
}
private static List <IncidenceMatrix> IncidenceExploreRecurse(IncidenceMatrix IMi, IncidenceMatrix IMf, double[] Noutvalr, double[] Noutvalc, List <IncidenceMatrix> IMlist, double minNReversed)
{
var IMset = new List <IncidenceMatrix>(1000);
List <int> notAssigned = FindNotAssignedModels(IMi, IMf);
List <int> reversed = FindReversedModels(IMi, IMf);
if (reversed.Count == 0)
{
reversed = new HashSet <int>(IMi.FindLocations(ANY).Select(l => l.i)).ToList();
}
for (int rev = 0; rev < reversed.Count; rev++)
{
int r = reversed[rev];
Vector <double> row = IMi.Row(r);
List <int> locations = row.FindLocations(ANY);
double currentValr = row.MultiplyNonZeroVector();
double Cvalr = Noutvalr[r] / currentValr;
for (int l = 0; l < locations.Count; l++)
{
int c = locations[l];
double currentValc = IMi.Column(c).MultiplyNonZeroVector();
double Cvalc = Noutvalc[c] / currentValc;
double R2 = Log(Cvalr) / Log(IN);
double C2 = Log(Cvalc) / Log(IN);
if (!IsInteger(C2) && !IsInteger(R2))
{
IncidenceMatrix IMg = IncidenceMatrix.Build.DenseOfMatrix(IMi);
IMg[r, c] = OUT;
IncidenceMatrixFirstStep(IMg, Noutvalr, Noutvalc, true);
FillAsInput(IMg, Noutvalr, Noutvalc);
if (IMg.FindLocations(ANY).Count == 0)
{
int NRevModels = FindNReversed(IMi, IMg);
if (NRevModels < minNReversed)
{
IMlist.Clear();
IMlist.Add(IMg);
minNReversed = NRevModels;
}
else if (NRevModels == minNReversed)
{
IMlist.Add(IMg);
}
else
{
// do nothing as inspected incidence already has more rev models than those stored.
}
if (IMlist.Count >= MaxWorkflowAlternatives || explorationWatch.ElapsedMilliseconds > MaxEllapsedTime)
{
return(IMlist);
}
}
else
{
IncidenceExplore(IMg, IMf, Noutvalr, Noutvalc);
}
}
}
}
if (IMlist.Count == 0)
{
throw new ArgumentException(NoIMsFoundErrorMessage);
}
return(IMlist);
}
/// <summary>
/// This funnction returns all possible workflows in an incidence matrix format, given the foundation matrix
/// as well as the vIndep vector which represent the independent variables.
/// This function is the top level function which performs the incidence matrix method.
/// </summary>
/// <param name="IMf"></param>
/// <param name="independent"></param>
/// <returns></returns>
private static IncidenceMatrix[] AllWorkflows(IncidenceMatrix IMf, int[] independent)
{
IncidenceMatrix IMi = IncidenceMatrix.Build.DenseOfMatrix(IMf);
// Number of outputs per row (affect model r)
IMi.ReplaceAlltoOne();
// valrf & valcf in [1]
double[] Noutvalr = new double[IMf.RowCount];
for (int model = 0; model < IMf.RowCount; model++)
{
int NOutputs = IMf.NOutputs(model);
int NVariables = IMi.NVariables(model); // Number of variables affecting model r
int NInputs = (NVariables - NOutputs);
Noutvalr[model] = ValRow(NOutputs, NInputs);
}
double[] Noutvalc = new double[IMf.ColumnCount];
for (int c = 0; c < IMf.ColumnCount; c++)
{
int NModels = IMi.Column(c).FindValue(ANY); // Number of models related to variable c
int NInputs = (NModels - 1);
Noutvalc[c] = ValColumn(NInputs);
}
// Assign user defined inputs/outputs
for (int variable = 0; variable < IMi.ColumnCount; variable++)
{
if (independent[variable] == MARKED_IN)
{
IMi.SetInput(variable); // Asign variable as input in IMi
}
else if (independent[variable] == MARKED_OUT)
{
IMi.SetOutput(variable, IMf);
}
}
List <int> notAssigned = FindNotAssignedModels(IMi, IMf);
if (notAssigned.Count == 0)
{
return(new IncidenceMatrix[1] {
IMf
});
}
IncidenceMatrixFirstStep(IMi, Noutvalr, Noutvalc, true);
FillAsInput(IMi, Noutvalr, Noutvalc);
IncidenceMatrixFirstStep(IMi, Noutvalr, Noutvalc, true);
////////////////////////
List <int> reversed = FindReversedModels(IMi, IMf);
bool reversedModelsInSCC = false;
List <int> modelsInScc = ModelsInSCCFromIMM(IMi);
foreach (int model in modelsInScc)
{
if (FindValueInArray(reversed, model)) // if ith model is in SCC and reversed then break
{
reversedModelsInSCC = true;
break;
}
}
if (!reversedModelsInSCC) //i.e. no models in SCC are modified/reversed
{
if (IMi.FindLocations(ANY).Count != 0)
{
// copy default SCC inputs and outputs to new incidence matrix, imMatrixi
IMi.CopyDefaultInputs(IMf, modelsInScc);
}
return(new IncidenceMatrix[1] {
IMi
});
}
else
{
// When clicking 'edit' then get incidence before it has been modified or if creating new object, then get default incidence
DesignStructureMatrix DSM = IMMtoDSM(IMf);
modelsInScc.Clear();
List <Cluster> clusters = Decompose(DSM);
foreach (Cluster cluster in clusters)
{
if (cluster.Count > 1)
{
modelsInScc.AddRange(cluster);
}
}
reversedModelsInSCC = false;
foreach (int model in modelsInScc)
{
// foreach model in SCC is any model...
if (FindValueInArray(reversed, model)) // if ith model is in SCC and reversed then break
{
reversedModelsInSCC = true;
break;
}
}
if (!reversedModelsInSCC) //i.e. copy existing SCC configurations
{
IMi.CopyDefaultInputs(IMf, modelsInScc);
}
}
////////////////////
if (IMi.FindLocations(ANY).Count > 0)
{
return(IncidenceExplore(IMi, IMf, Noutvalr, Noutvalc));
//incmset=uniqueincmset(incmset);Unque object has to be added here....
}
else
{
return(new IncidenceMatrix[1] {
IMi
});
}
throw new ArgumentException(NoIMsFoundErrorMessage);
}