mvpa2.mappers.base.Mapper

Inheritance diagram of Mapper

class mvpa2.mappers.base.Mapper(**kwargs)

Basic mapper interface definition.

.. rubric:: Notes

Available conditional attributes:

  • calling_time+: Time (in seconds) it took to call the node
  • raw_results: Computed results before invoking postproc. Stored only if postproc is not None.
  • training_time+: Time (in seconds) it took to train the learner

(Conditional attributes enabled by default suffixed with +)

Methods

forward(data) Map data from input to output space.
forward1(data) Wrapper method to map single samples.
generate(ds) Yield processing results.
get_postproc() Returns the post-processing node or None.
get_space() Query the processing space name of this node.
reset()
reverse(data) Reverse-map data from output back into input space.
reverse1(data) Wrapper method to map single samples.
set_postproc(node) Assigns a post-processing node Set to None to disable postprocessing.
set_space(name) Set the processing space name of this node.
train(ds) The default implementation calls _pretrain(), _train(), and finally _posttrain().
untrain() Reverts changes in the state of this node caused by previous training
Parameters:

enable_ca : None or list of str

Names of the conditional attributes which should be enabled in addition to the default ones

disable_ca : None or list of str

Names of the conditional attributes which should be disabled

auto_train : bool

Flag whether the learner will automatically train itself on the input dataset when called untrained.

force_train : bool

Flag whether the learner will enforce training on the input dataset upon every call.

space: str, optional :

Name of the ‘processing space’. The actual meaning of this argument heavily depends on the sub-class implementation. In general, this is a trigger that tells the node to compute and store information about the input data that is “interesting” in the context of the corresponding processing in the output dataset.

postproc : Node instance, optional

Node to perform post-processing of results. This node is applied in __call__() to perform a final processing step on the to be result dataset. If None, nothing is done.

descr : str

Description of the instance

Methods

forward(data) Map data from input to output space.
forward1(data) Wrapper method to map single samples.
generate(ds) Yield processing results.
get_postproc() Returns the post-processing node or None.
get_space() Query the processing space name of this node.
reset()
reverse(data) Reverse-map data from output back into input space.
reverse1(data) Wrapper method to map single samples.
set_postproc(node) Assigns a post-processing node Set to None to disable postprocessing.
set_space(name) Set the processing space name of this node.
train(ds) The default implementation calls _pretrain(), _train(), and finally _posttrain().
untrain() Reverts changes in the state of this node caused by previous training
forward(data)

Map data from input to output space.

Parameters:

data : Dataset-like, (at least 2D)-array-like

Typically this is a Dataset, but it might also be a plain data array, or even something completely different(TM) that is supported by a subclass’ implementation. If such an object is Dataset-like it is handled by a dedicated method that also transforms dataset attributes if necessary. If an array-like is passed, it has to be at least two-dimensional, with the first axis separating samples or observations. For single samples forward1() might be more appropriate.

forward1(data)

Wrapper method to map single samples.

It is basically identical to forward(), but also accepts one-dimensional arguments. The map whole dataset this method cannot be used. but forward() handles them.

reverse(data)

Reverse-map data from output back into input space.

Parameters:

data : Dataset-like, anything

Typically this is a Dataset, but it might also be a plain data array, or even something completely different(TM) that is supported by a subclass’ implementation. If such an object is Dataset-like it is handled by a dedicated method that also transforms dataset attributes if necessary.

reverse1(data)

Wrapper method to map single samples.

It is basically identical to reverse(), but accepts one-dimensional arguments. To map whole dataset this method cannot be used. but reverse() handles them.

NeuroDebian

NITRC-listed