class RooQuasiRandomGenerator
This class generates the quasi-random (aka "low discrepancy") sequence for dimensions up to 12 using the Niederreiter base 2 algorithm described in Bratley, Fox, Niederreiter, ACM Trans. Model. Comp. Sim. 2, 195 (1992). This implementation was adapted from the 0.9 beta release of the GNU scientific library. Quasi-random number sequences are useful for improving the convergence of a Monte Carlo integration.
Function Members (Methods)
public:
| RooQuasiRandomGenerator() | |
| RooQuasiRandomGenerator(const RooQuasiRandomGenerator&) | |
| virtual | ~RooQuasiRandomGenerator() |
| static TClass* | Class() |
| Bool_t | generate(UInt_t dimension, Double_t* vector) |
| virtual TClass* | IsA() const |
| RooQuasiRandomGenerator& | operator=(const RooQuasiRandomGenerator&) |
| void | reset() |
| virtual void | ShowMembers(TMemberInspector& insp, char* parent) |
| virtual void | Streamer(TBuffer& b) |
| void | StreamerNVirtual(TBuffer& b) |
protected:
| Int_t | add(Int_t x, Int_t y) const |
| void | calculateCoefs(UInt_t dimension) |
| void | calculateV(const int* px, int px_degree, int* pb, int* pb_degree, int* v, int maxv) |
| Int_t | mul(Int_t x, Int_t y) const |
| void | polyMultiply(const int* pa, int pa_degree, const int* pb, int pb_degree, int* pc, int* pc_degree) |
| Int_t | sub(Int_t x, Int_t y) const |
Class Charts
Function documentation
RooQuasiRandomGenerator()
Perform one-time initialization of our static coefficient array if necessary and initialize our workspace.
Bool_t generate(UInt_t dimension, Double_t* vector)
Generate the next number in the sequence for the specified dimension. The maximum dimension supported is 12.
void calculateV(const int* px, int px_degree, int* pb, int* pb_degree, int* v, int maxv)
Internal function
void polyMultiply(const int* pa, int pa_degree, const int* pb, int pb_degree, int* pc, int* pc_degree)
Internal function