Package gmisclib :: Module mcmc :: Class position_nonrepeatable

Class position_nonrepeatable

This is for the (unfortunately common) case where logp is an indpendent random function of its arguments. It does not cache as much as position_repeatable. Arguments are analogous to position_repeatable.

Note: I think this class is obsolete, given the call to T_acceptor.probe() that is not inserted in to BootStepper.step().

Instance Methods

__init__(self, x, problem_def, logp=None)
You need this function and this signature if you are going to pass it to make_list_of_positions(), but not necessarily otherwise.

source code

logp(self)
Compute the log of the probability for the position.

source code

logp_nocompute(self)
Shows a recent logp value.

source code

position_base or a subclass

new(self, shift, logp=None)
Returns a new position, shifted by the specified amount.

source code

__repr__(self)
repr(x)

source code

__cmp__(self, other)
This is used when the archive is sorted. (Inherited from gmisclib.mcmc.position_base)

source code

prms(self)
The result of this function is to be handed to problem_definition.logp(). (Inherited from gmisclib.mcmc.position_base)

source code

uid(self) (Inherited from gmisclib.mcmc.position_base)

source code

vec(self)
Returns a numpy vector. (Inherited from gmisclib.mcmc.position_base)

source code

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __str__, __subclasshook__

Class Variables
	HUGE = `1e+38`

Properties
Inherited from `object`: `__class__`

Method Details

init(self, x, problem_def, logp=None)
(Constructor)

source code

You need this function and this signature if you are going to pass it to make_list_of_positions(), but not necessarily otherwise.

Decorators:

@g_implements.make_optional

Overrides: object.__init__

(inherited documentation)

logp(self)

source code

Compute the log of the probability for the position.

Overrides: position_base.logp: (inherited documentation)

logp_nocompute(self)

source code

Shows a recent logp value. It should not compute a value unless necessary. The intent is to look up a value in a cache.

Overrides: position_base.logp_nocompute: (inherited documentation)

new(self, shift, logp=None)

source code

Returns a new position, shifted by the specified amount.

Parameters:

shift - How much of a move to make to the new position?
logp - (optional) If this is supplied, is is used to set the log(P) value for the newly created position structure.

Returns: position_base or a subclass

a new position

Overrides: position_base.new

repr(self)
(Representation operator)

source code

repr(x)

Overrides: object.__repr__: (inherited documentation)

Class position_nonrepeatable

__init__(self, x, problem_def, logp=None) (Constructor)

logp(self)

logp_nocompute(self)

new(self, shift, logp=None)

__repr__(self) (Representation operator)

init(self, x, problem_def, logp=None)
(Constructor)

repr(self)
(Representation operator)