/usr/include/JAGS/graph/ConstantNode.h is in jags 4.1.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | #ifndef CONSTANT_NODE_H_
#define CONSTANT_NODE_H_
#include <graph/Node.h>
namespace jags {
/**
* @short Top-level Node with constant value
*
* Constant nodes are the top-level nodes in any directed acyclic
* graph (i.e. they have no parents). They have a fixed value that is
* defined when they are constructed and which is shared across all
* chains.
*
* JAGS distinguishes between two classes of ConstantNode. Those
* defined explicitly as constants in the BUGS language description of
* the model are constructed with the parameter observed=false, and
* are not considered random variables. Constant nodes that are
* implicitly defined (i.e. they only appear on the left hand side of
* any relation and their values are determined by the user-supplied
* data) are constructed with the parameter observed=true and are
* considered to represent observed randmo variables.
*/
class ConstantNode : public Node {
const bool _observed;
public:
/**
* Constructs a scalar constant node and sets its value. The value
* is fixed and is shared between all chains.
*/
ConstantNode(double value, unsigned int nchain, bool observed);
/**
* Constructs a multi-dimensional constant node
*/
ConstantNode(std::vector<unsigned int> const &dim,
std::vector<double> const &value,
unsigned int nchain, bool observed);
/**
* Indicates whether a ConstantNode is discrete-valued
*/
bool isDiscreteValued() const;
/**
* This function does nothing. It exists only so that objects
* inheriting from ConstantNode can be instantiated.
*/
void deterministicSample(unsigned int);
/**
* This function does nothing. The value of the constant node is
* not changed and the state of the RNG remains the same.
*/
void randomSample(RNG*, unsigned int);
/**
* Constant nodes have no parents. This function always returns true.
*/
bool checkParentValues(unsigned int) const;
/**
* A constant node is named after its value
*/
std::string deparse(std::vector<std::string> const &parents) const;
/**
* A constant node is always fixed.
*/
bool isFixed() const;
/**
* The RVStatus of a ConstantNode is determined by the parameter
* "observed" passed to the constructor.
*/
RVStatus randomVariableStatus() const;
void unlinkParents();
};
} /* namespace jags */
#endif /* CONSTANT_NODE_H_ */
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