Taxi Class Reference

#include <taxi.hh>

Inheritance diagram for Taxi:

List of all members.

Classes
class	DefaultLandmarks
Public Member Functions
virtual float	apply (int action)
experience	getExp (float s0, float s1, float s2, float s3, int a)
virtual void	getMinMaxFeatures (std::vector< float > *minFeat, std::vector< float > *maxFeat)
virtual void	getMinMaxReward (float *minR, float *maxR)
virtual int	getNumActions ()
virtual std::vector< experience >	getSeedings ()
virtual void	reset ()
virtual const std::vector < float > &	sensation () const
void	setSensation (std::vector< float > newS)
	Taxi (Random &rand, const Gridworld *gridworld, bool stochastic)
	Taxi (Random &rand)
	Taxi (Random &rand, bool stochastic)
	Taxi (Random &rand, unsigned width, unsigned height, bool stochastic)
virtual bool	terminal () const
virtual	~Taxi ()
Protected Types
typedef std::pair< float, float >	coord_t
enum	taxi_action_t {   NORTH, SOUTH, EAST, WEST,   PICKUP, PUTDOWN }
Private Member Functions
taxi_action_t	add_noise (taxi_action_t action)
void	apply_fickle_passenger ()
void	randomize_landmarks ()
void	randomize_landmarks_to_corners ()
Static Private Member Functions
static const Gridworld *	create_default_map ()
Private Attributes
float &	dest
float &	ew
bool	fickle
const Gridworld *const	grid
std::vector< coord_t >	landmarks
const bool	noisy
float &	ns
float &	pass
Random &	rng
std::vector< float >	s
Static Private Attributes
static const DefaultLandmarks	defaultlandmarks

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Detailed Description

This class defines the Taxi domain.

Definition at line 17 of file taxi.hh.

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Member Typedef Documentation

typedef std::pair<float,float> Taxi::coord_t [protected]

Definition at line 66 of file taxi.hh.

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Member Enumeration Documentation

enum Taxi::taxi_action_t [protected]

Enumerator:

NORTH
SOUTH
EAST
WEST
PICKUP
PUTDOWN

Definition at line 67 of file taxi.hh.

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Constructor & Destructor Documentation

Taxi::Taxi	(	Random &	rand,
		const Gridworld *	gridworld,
		bool	stochastic
	)

Creates a Taxi domain using the specified map.

Parameters:

rand	Random number generator to use.
gridworld	The map to use.
stochastic	Whether to use nondeterministic actions and fickle passenger.

Definition at line 19 of file taxi.cc.

Taxi::Taxi

(

Random &

rand

)

Creates a deterministic Taxi domain.

Parameters:

rand	Random number generator used solely for random initial states.

Definition at line 31 of file taxi.cc.

Taxi::Taxi	(	Random &	rand,
		bool	stochastic
	)

Creates a possibly noisy Taxi domain.

Parameters:

rand	Random number generator to use.
stochastic	Whether to use nondeterministic actions and fickle passenger.

Definition at line 45 of file taxi.cc.

Taxi::Taxi	(	Random &	rand,
		unsigned	width,
		unsigned	height,
		bool	stochastic
	)

Creates a random Taxi domain of the given size.

Parameters:

rand	Random number generator to use.
width	width of grid
height	height of grid
stochastic	Whether to use nondeterministic actions and fickle passenger.

Definition at line 59 of file taxi.cc.

Taxi::~Taxi

(

)

[virtual]

Definition at line 72 of file taxi.cc.

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Member Function Documentation

Taxi::taxi_action_t Taxi::add_noise

(

taxi_action_t

action

)

[private]

Corrupts a movement action.

Parameters:

action

The intended action

Returns:

The action actually executed

Definition at line 172 of file taxi.cc.

float Taxi::apply

(

int

action

)

[virtual]

Implements Environment.

Definition at line 76 of file taxi.cc.

void Taxi::apply_fickle_passenger

(

)

[private]

If the domain is noisy and the taxi has just taken its first step since picking up the passenger, then potentially change the destination.

Definition at line 185 of file taxi.cc.

const Gridworld * Taxi::create_default_map

(

)

[static, private]

Create the default gridworld

Definition at line 160 of file taxi.cc.

experience Taxi::getExp	(	float	s0,
		float	s1,
		float	s2,
		float	s3,
		int	a
	)

Get an example experience for the given state-action.

Definition at line 263 of file taxi.cc.

void Taxi::getMinMaxFeatures	(	std::vector< float > *	minFeat,
		std::vector< float > *	maxFeat
	)		[virtual]

Implements Environment.

Definition at line 286 of file taxi.cc.

void Taxi::getMinMaxReward	(	float *	minR,
		float *	maxR
	)		[virtual]

Implements Environment.

Definition at line 303 of file taxi.cc.

int Taxi::getNumActions

(

)

[virtual]

Implements Environment.

Definition at line 155 of file taxi.cc.

std::vector< experience > Taxi::getSeedings

(

)

[virtual]

Reimplemented from Environment.

Definition at line 240 of file taxi.cc.

void Taxi::randomize_landmarks

(

)

[private]

Randomly assigns the four landmarks to any four distinct positions in the world.

Definition at line 197 of file taxi.cc.

void Taxi::randomize_landmarks_to_corners

(

)

[private]

Randomly assigns the landmarks to positions near the corners of the map.

Definition at line 217 of file taxi.cc.

void Taxi::reset

(

void

)

[virtual]

Implements Environment.

Definition at line 144 of file taxi.cc.

const std::vector< float > & Taxi::sensation

(

)

const [virtual]

Implements Environment.

Definition at line 74 of file taxi.cc.

void Taxi::setSensation

(

std::vector< float >

newS

)

[virtual]

Set the current state (for debug purposes)

Reimplemented from Environment.

Definition at line 230 of file taxi.cc.

bool Taxi::terminal

(

)

const [virtual]

Implements Environment.

Definition at line 140 of file taxi.cc.

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Member Data Documentation

const Taxi::DefaultLandmarks Taxi::defaultlandmarks [static, private]

Definition at line 92 of file taxi.hh.

float& Taxi::dest [private]

Definition at line 87 of file taxi.hh.

float& Taxi::ew [private]

Definition at line 85 of file taxi.hh.

bool Taxi::fickle [private]

Definition at line 82 of file taxi.hh.

const Gridworld* const Taxi::grid [private]

Definition at line 76 of file taxi.hh.

std::vector<coord_t> Taxi::landmarks [private]

Definition at line 77 of file taxi.hh.

const bool Taxi::noisy [private]

Definition at line 78 of file taxi.hh.

float& Taxi::ns [private]

Definition at line 84 of file taxi.hh.

float& Taxi::pass [private]

Definition at line 86 of file taxi.hh.

Random& Taxi::rng [private]

Definition at line 79 of file taxi.hh.

std::vector<float> Taxi::s [private]

Definition at line 81 of file taxi.hh.

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

• taxi.hh
• taxi.cc