#include <RandomVar.h>
Inheritance diagram for PLearn::NegRandomVariable:
Public Member Functions | |
NegRandomVariable (RandomVariable *input) | |
NegRandomVariable *. | |
virtual char * | classname () |
void | setValueFromParentsValue () |
set the field value from the values of the parents | |
bool | invertible (const Var &obs, RVInstanceArray &unobserved_parents, Var **JacobianCorrection) |
!< SUBCLASS WRITERS: IMPLEMENT FUNCTIONS BELOW //!< | |
void | EMBprop (const Vec obs, real post) |
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Definition at line 1234 of file RandomVar.cc. |
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Implements PLearn::RandomVariable. Definition at line 1170 of file RandomVar.h. |
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************ EM STUFF ********** propagate posterior information to parents in order to perform an EMupdate at the end of an EMEpoch. In the case of mixture-like RVs and their components, the posterior is the probability of the component "this" given the observation "obs". Implements PLearn::RandomVariable. Definition at line 1251 of file RandomVar.cc. References PLearn::Vec. |
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!< SUBCLASS WRITERS: IMPLEMENT FUNCTIONS BELOW //!< check whether it is possible to invert the function which maps the given unobserved parents to the observed value of the RV (obs). If invertible, do the inversion, and set the value fields of the RVInstances to Var's which are functionally dependent on obs. If the absolute value of the Jacobian of the map from the unobserved parents to this R.V.'s value is different from 1, then JacobianCorrection should point to a Var that is the logarithm of the determinant of this Jacobian (first derivatives) matrix. If the function is not invertible but it is possible to write P(Y==obs | unobserved_parents) in terms of the unobserved_parents logP functions, then the sub-class writer should instead redefine the logP function appropriately. Reimplemented from PLearn::FunctionalRandomVariable. Definition at line 1243 of file RandomVar.cc. |
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set the field value from the values of the parents
Implements PLearn::FunctionalRandomVariable. Definition at line 1237 of file RandomVar.cc. |