gtsam::Symbol Class Reference

Detailed Description

Character and index key used in VectorValues, GaussianFactorGraph, GaussianFactor, etc.

These keys are generated at runtime from TypedSymbol keys when linearizing a nonlinear factor graph. This key is not type safe, so cannot be used with any Nonlinear* classes.

Public Member Functions
	Symbol ()
	Default constructor.
	Symbol (const Symbol &key)
	Copy constructor.
	Symbol (unsigned char c, std::uint64_t j)
	Constructor.
	Symbol (Key key)
	Constructor that decodes an integer Key.
Key	key () const
	return Key (integer) representation
	operator Key () const
	Cast to integer.
void	print (const std::string &s="") const
	Print.
bool	equals (const Symbol &expected, double tol=0.0) const
	Check equality.
unsigned char	chr () const
	Retrieve key character.
std::uint64_t	index () const
	Retrieve key index.
	operator std::string () const
	Create a string from the key.
bool	operator< (const Symbol &comp) const
	Comparison for use in maps.
bool	operator== (const Symbol &comp) const
	Comparison for use in maps.
bool	operator== (Key comp) const
	Comparison for use in maps.
bool	operator!= (const Symbol &comp) const
	Comparison for use in maps.
bool	operator!= (Key comp) const
	Comparison for use in maps.

Static Public Member Functions
static boost::function< bool(Key)>	ChrTest (unsigned char c)
	Return a filter function that returns true when evaluated on a Key whose character (when converted to a Symbol) matches c. More...

Protected Attributes
unsigned char	c_
std::uint64_t	j_

Friends
class	boost::serialization::access
	Serialization function.

Member Function Documentation

boost::function< bool(Key)> gtsam::Symbol::ChrTest ( unsigned char  c )

static

Return a filter function that returns true when evaluated on a Key whose character (when converted to a Symbol) matches c.

Use this with the Values::filter() function to retrieve all key-value pairs with the requested character.

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

• /build/rock-master-18.09-slam-gtsam-0.20160620/gtsam/inference/Symbol.h
• /build/rock-master-18.09-slam-gtsam-0.20160620/gtsam/inference/Symbol.cpp