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IMP Reference Guide  2.5.0
The Integrative Modeling Platform
vonMisesKappaJeffreysRestraint.h
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1 /**
2  * \file IMP/isd/vonMisesKappaJeffreysRestraint.h
3  * \brief Jeffreys prior for \f$\kappa\f$ in the von Mises distribution.
4  *
5  * Copyright 2007-2015 IMP Inventors. All rights reserved.
6  *
7  */
8 
9 #ifndef IMPISD_VON_MISES_KAPPA_JEFFREYS_RESTRAINT_H
10 #define IMPISD_VON_MISES_KAPPA_JEFFREYS_RESTRAINT_H
11 
12 #include <IMP/isd/isd_config.h>
13 #include <IMP/SingletonScore.h>
14 #include <IMP/Restraint.h>
15 
16 IMPISD_BEGIN_NAMESPACE
17 
18 //! Jeffreys prior for the \f$\kappa\f$ concentration parameter of a von Mises
19 //! distribution.
20 //! \f[p(\kappa) = \sqrt{\frac{I_1(\kappa)}{I_0(\kappa)}
21 // \left[
22 // \kappa
23 // -\frac{I_1(\kappa)}{I_0(\kappa)}
24 // -kappa\left(\frac{I_1(\kappa)}{I_0(\kappa)}\right)^2
25 // \right]}\f]
26 //!
27 
28 class IMPISDEXPORT vonMisesKappaJeffreysRestraint : public Restraint {
29  Pointer<Particle> kappa_;
30  double old_kappaval;
31  double I0_, I1_;
32 
33  public:
34  //! Create the restraint.
36 
37  /** This macro declares the basic needed methods: evaluate and show
38  */
39  virtual double unprotected_evaluate(IMP::DerivativeAccumulator *accum)
40  const IMP_OVERRIDE;
43 
44  virtual double get_probability() const;
45 
46  private:
47  void update_bessel(double kappaval); // update memoized bessel values
48 };
49 
50 IMPISD_END_NAMESPACE
51 
52 #endif /* IMPISD_VON_MISES_KAPPA_JEFFREYS_RESTRAINT_H */
#define IMP_OBJECT_METHODS(Name)
Define the basic things needed by any Object.
Definition: object_macros.h:25
A smart pointer to a reference counted object.
Definition: Pointer.h:87
Class for storing model, its restraints, constraints, and particles.
Definition: Model.h:72
Define SingletonScore.
Class to handle individual model particles.
Definition: Particle.h:37
Abstract base class for all restraints.
virtual ModelObjectsTemp do_get_inputs() const =0
#define IMP_OVERRIDE
Cause a compile error if this method does not override a parent method.
Class for adding derivatives from restraints to the model.
A restraint is a term in an IMP ScoringFunction.
Definition: Restraint.h:52