mvpa2.mappers.slicing.StripBoundariesSamples

class mvpa2.mappers.slicing.StripBoundariesSamples(space, prestrip, poststrip, **kwargs)

Strip samples on boundaries defines by sample attribute values.

A sample attribute of a dataset is scanned for consecutive blocks of identical values. Every change in the value is treated as a boundary and custom number of samples is removed prior and after this boundary.

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.

(Conditional attributes enabled by default suffixed with +)

Methods

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()
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.

Parameters:

space : str

name of the sample attribute that shall be used to determine the boundaries.

prestrip : int

Number of samples to be stripped prior to each boundary.

poststrip : int

Number of samples to be stripped after each boundary (this includes the boundary sample itself, i.e. the first samples with a different sample attribute value).

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

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

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()
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.