SNAP Library 2.1, User Reference  2013-09-25 10:47:25
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Public Member Functions | Public Attributes
TCascade Class Reference

#include <cascdynetinf.h>

List of all members.

Public Member Functions

 TCascade ()
 TCascade (const int &model)
 TCascade (const int &cid, const int &model)
 TCascade (TSIn &SIn)
void Save (TSOut &SOut) const
void Clr ()
int GetId ()
int Len () const
int LenBeforeT (const double &T)
int LenAfterT (const double &T)
int GetNode (const int &i) const
THash< TInt, THitInfo >::TIter BegI () const
THash< TInt, THitInfo >::TIter EndI () const
int GetModel () const
double GetTm (const int &NId) const
double GetMaxTm () const
double GetMinTm () const
void Add (const int &NId, const double &HitTm)
void Del (const int &NId)
bool IsNode (const int &NId) const
void Sort ()
bool operator< (const TCascade &Cascade) const
 TCascade ()
 TCascade (const double &alpha)
 TCascade (const double &alpha, const int &model)
 TCascade (const double &alpha, const double &eps)
 TCascade (const double &alpha, const int &model, const double &eps)
 TCascade (TSIn &SIn)
void Save (TSOut &SOut) const
void Clr ()
int Len () const
int GetNode (const int &i) const
int GetParent (const int NId) const
double GetAlpha () const
double GetTm (const int &NId) const
void Add (const int &NId, const double &HitTm)
void Del (const int &NId)
bool IsNode (const int &NId) const
void Sort ()
double TransProb (const int &NId1, const int &NId2) const
double GetProb (const PNGraph &G)
void InitProb ()
double UpdateProb (const int &N1, const int &N2, const bool &UpdateProb=false)

Public Attributes

TInt CId
THash< TInt, THitInfo > NIdHitH
TInt Model
TFlt CurProb
TFlt Alpha
TFlt Eps

Detailed Description

Definition at line 84 of file cascdynetinf.h.

Constructor & Destructor Documentation

TCascade::TCascade ( ) [inline]

Definition at line 90 of file cascdynetinf.h.

: CId(0), NIdHitH(), Model(0) { }
TCascade::TCascade ( const int &  model) [inline]

Definition at line 91 of file cascdynetinf.h.

: NIdHitH() { Model = model; }
TCascade::TCascade ( const int &  cid,
const int &  model 
) [inline]

Definition at line 92 of file cascdynetinf.h.

: NIdHitH() { CId = cid; Model = model; }
TCascade::TCascade ( TSIn &  SIn) [inline]

Definition at line 93 of file cascdynetinf.h.

: CId(SIn), NIdHitH(SIn), Model(SIn) { }
TCascade::TCascade ( ) [inline]

Definition at line 26 of file cascnetinf.h.

: NIdHitH(), CurProb(0), Alpha(1.0), Eps(1e-64), Model(0) { }
TCascade::TCascade ( const double &  alpha) [inline]

Definition at line 27 of file cascnetinf.h.

: NIdHitH(), CurProb(0), Alpha(alpha), Eps(1e-64), Model(0) { }
TCascade::TCascade ( const double &  alpha,
const int &  model 
) [inline]

Definition at line 28 of file cascnetinf.h.

: NIdHitH(), CurProb(0), Alpha(alpha), Eps(1e-64), Model(model) { }
TCascade::TCascade ( const double &  alpha,
const double &  eps 
) [inline]

Definition at line 29 of file cascnetinf.h.

: NIdHitH(), CurProb(0), Alpha(alpha), Eps(eps), Model(0) { }
TCascade::TCascade ( const double &  alpha,
const int &  model,
const double &  eps 
) [inline]

Definition at line 30 of file cascnetinf.h.

: NIdHitH(), CurProb(0), Alpha(alpha), Eps(eps), Model(model) { }
TCascade::TCascade ( TSIn &  SIn) [inline]

Definition at line 31 of file cascnetinf.h.

: NIdHitH(SIn), CurProb(SIn), Alpha(SIn) { }

Member Function Documentation

void TCascade::Add ( const int &  NId,
const double &  HitTm 
) [inline]

Definition at line 39 of file cascnetinf.h.

{ NIdHitH.AddDat(NId, THitInfo(NId, HitTm)); }
void TCascade::Add ( const int &  NId,
const double &  HitTm 
) [inline]

Definition at line 107 of file cascdynetinf.h.

{ NIdHitH.AddDat(NId, THitInfo(NId, HitTm)); }
THash<TInt, THitInfo>::TIter TCascade::BegI ( ) const [inline]

Definition at line 101 of file cascdynetinf.h.

{ return NIdHitH.BegI(); }
void TCascade::Clr ( ) [inline]

Definition at line 33 of file cascnetinf.h.

{ NIdHitH.Clr(); CurProb = 0; Alpha = 1.0; }
void TCascade::Clr ( ) [inline]

Definition at line 95 of file cascdynetinf.h.

{ NIdHitH.Clr(); }
void TCascade::Del ( const int &  NId) [inline]

Definition at line 40 of file cascnetinf.h.

{ NIdHitH.DelKey(NId); }
void TCascade::Del ( const int &  NId) [inline]

Definition at line 108 of file cascdynetinf.h.

{ NIdHitH.DelKey(NId); }
THash<TInt, THitInfo>::TIter TCascade::EndI ( ) const [inline]

Definition at line 102 of file cascdynetinf.h.

{ return NIdHitH.EndI(); }
double TCascade::GetAlpha ( ) const [inline]

Definition at line 37 of file cascnetinf.h.

{ return Alpha; }
int TCascade::GetId ( ) [inline]

Definition at line 96 of file cascdynetinf.h.

{ return CId; }
double TCascade::GetMaxTm ( ) const [inline]

Definition at line 105 of file cascdynetinf.h.

{ return NIdHitH[NIdHitH.Len()-1].Tm; } // we assume the cascade is sorted
double TCascade::GetMinTm ( ) const [inline]

Definition at line 106 of file cascdynetinf.h.

{ return NIdHitH[0].Tm; } // we assume the cascade is sorted
int TCascade::GetModel ( ) const [inline]

Definition at line 103 of file cascdynetinf.h.

{ return Model; }
int TCascade::GetNode ( const int &  i) const [inline]

Definition at line 35 of file cascnetinf.h.

{ return NIdHitH.GetKey(i); }
int TCascade::GetNode ( const int &  i) const [inline]

Definition at line 100 of file cascdynetinf.h.

{ return NIdHitH.GetKey(i); }
int TCascade::GetParent ( const int  NId) const [inline]

Definition at line 36 of file cascnetinf.h.

{ return NIdHitH.GetDat(NId).Parent; }
double TCascade::GetProb ( const PNGraph &  G)

Definition at line 17 of file cascnetinf.cpp.

                                         {
    double P = 0;
    for (int n = 0; n < Len(); n++) {
      const int DstNId = GetNode(n);
      const double DstTm = GetTm(DstNId);
      TNGraph::TNodeI NI = G->GetNI(DstNId);
      double MxProb = log(Eps);
      int BestParent = -1;
      for (int e = 0; e < NI.GetInDeg(); e++) {
        const int SrcNId = NI.GetInNId(e);
        if (IsNode(SrcNId) && GetTm(SrcNId) < DstTm) {
          const double Prob = log(TransProb(SrcNId, DstNId));
          if (MxProb < Prob) { MxProb = Prob;  BestParent = SrcNId; }
        }
      }
      NIdHitH.GetDat(DstNId).Parent = BestParent;
      P += MxProb;
    }

    return P;
}
double TCascade::GetTm ( const int &  NId) const [inline]

Definition at line 38 of file cascnetinf.h.

{ return NIdHitH.GetDat(NId).Tm; }
double TCascade::GetTm ( const int &  NId) const [inline]

Definition at line 104 of file cascdynetinf.h.

{ return NIdHitH.GetDat(NId).Tm; }
void TCascade::InitProb ( )

Definition at line 40 of file cascnetinf.cpp.

                        {
    CurProb = log(Eps) * Len();
    for (int i = 0; i < Len(); i++) {
      NIdHitH[i].Parent = -1; }
}
bool TCascade::IsNode ( const int &  NId) const [inline]

Definition at line 41 of file cascnetinf.h.

{ return NIdHitH.IsKey(NId); }
bool TCascade::IsNode ( const int &  NId) const [inline]

Definition at line 109 of file cascdynetinf.h.

{ return NIdHitH.IsKey(NId); }
int TCascade::Len ( ) const [inline]

Definition at line 34 of file cascnetinf.h.

{ return NIdHitH.Len(); }
int TCascade::Len ( ) const [inline]

Definition at line 97 of file cascdynetinf.h.

{ return NIdHitH.Len(); }
int TCascade::LenAfterT ( const double &  T) [inline]

Definition at line 99 of file cascdynetinf.h.

{ int len = 0; while (len < NIdHitH.Len() && NIdHitH[NIdHitH.Len()-1-len].Tm >= T) { len++; } return len; }
int TCascade::LenBeforeT ( const double &  T) [inline]

Definition at line 98 of file cascdynetinf.h.

{ int len = 0; while (len < NIdHitH.Len() && NIdHitH[len].Tm <= T) { len++; } return len; }
bool TCascade::operator< ( const TCascade &  Cascade) const [inline]

Definition at line 111 of file cascdynetinf.h.

                                                  {
      return Len() < Cascade.Len(); }
void TCascade::Save ( TSOut &  SOut) const [inline]

Definition at line 32 of file cascnetinf.h.

{ NIdHitH.Save(SOut); CurProb.Save(SOut); Alpha.Save(SOut); }
void TCascade::Save ( TSOut &  SOut) const [inline]

Definition at line 94 of file cascdynetinf.h.

{ CId.Save(SOut); NIdHitH.Save(SOut); Model.Save(SOut); }
void TCascade::Sort ( ) [inline]

Definition at line 42 of file cascnetinf.h.

{ NIdHitH.SortByDat(true); }
void TCascade::Sort ( ) [inline]

Definition at line 110 of file cascdynetinf.h.

{ NIdHitH.SortByDat(true); }
double TCascade::TransProb ( const int &  NId1,
const int &  NId2 
) const

Definition at line 4 of file cascnetinf.cpp.

                                                                 {
  if (!IsNode(NId1) || !IsNode(NId2)) { return Eps.Val; }
  if (GetTm(NId1) >= GetTm(NId2)) { return Eps.Val; }
  if (Model==0)
    return Alpha*exp(-Alpha*(GetTm(NId2)-GetTm(NId1))); // exponential
  else if (Model==1)
    return (Alpha-1)*pow((GetTm(NId2)-GetTm(NId1)), -Alpha); // power-law
  else
    return Alpha*(GetTm(NId2)-GetTm(NId1))*exp(-0.5*Alpha*pow(GetTm(NId2)-GetTm(NId1), 2)); // rayleigh

  return (-1);
}
double TCascade::UpdateProb ( const int &  N1,
const int &  N2,
const bool &  UpdateProb = false 
)

Definition at line 47 of file cascnetinf.cpp.

                                                                                {
    if (!IsNode(N1) || !IsNode(N2)) { return CurProb; }
    if (GetTm(N1) >= GetTm(N2)) { return CurProb; }
    const double P1 = log(TransProb(GetParent(N2), N2));
    const double P2 = log(TransProb(N1, N2)); // N1 influences N2
    if (P1 < P2) {
      if (UpdateProb) { // the edge is there, update the CurProb and best Parent
        CurProb = CurProb - P1 + P2;
        NIdHitH.GetDat(N2).Parent = N1;
      } else {
        return CurProb - P1 + P2; }
    }
    return CurProb;
}

Member Data Documentation

TFlt TCascade::Alpha

Definition at line 23 of file cascnetinf.h.

TInt TCascade::CId

Definition at line 86 of file cascdynetinf.h.

TFlt TCascade::CurProb

Definition at line 23 of file cascnetinf.h.

TFlt TCascade::Eps

Definition at line 23 of file cascnetinf.h.

TInt TCascade::Model

Definition at line 88 of file cascdynetinf.h.

THash< TInt, THitInfo > TCascade::NIdHitH

Definition at line 87 of file cascdynetinf.h.

The documentation for this class was generated from the following files: