mne.decoding.GeneralizingEstimator

class mne.decoding.GeneralizingEstimator(base_estimator, scoring=None, n_jobs=1, verbose=None)

Generalization Light.

Fit a search-light along the last dimension and use them to apply a systematic cross-tasks generalization.

Parameters

base_estimatorobject

The base estimator to iteratively fit on a subset of the dataset.

scoringcallable() | str | None

Score function (or loss function) with signature score_func(y, y_pred, **kwargs). Note that the predict_method is automatically identified if scoring is a string (e.g. scoring=”roc_auc” calls predict_proba) but is not automatically set if scoring is a callable (e.g. scoring=sklearn.metrics.roc_auc_score).

n_jobsint

The number of jobs to run in parallel (default 1). Requires the joblib package. The number of jobs to run in parallel for both fit and predict. If -1, then the number of jobs is set to the number of cores.

verbosebool, str, int, or None

If not None, override default verbose level (see mne.verbose() and Logging documentation for more). If used, it should be passed as a keyword-argument only.

Attributes

classes_

Methods

__hash__(/)	Return hash(self).
decision_function(X)	Estimate distances of each data slice to all hyperplanes.
fit(X, y, **fit_params)	Fit a series of independent estimators to the dataset.
fit_transform(X, y, **fit_params)	Fit and transform a series of independent estimators to the dataset.
get_params([deep])	Get parameters for this estimator.
predict(X)	Predict each data slice with all possible estimators.
predict_proba(X)	Estimate probabilistic estimates of each data slice with all possible estimators.
score(X, y)	Score each of the estimators on the tested dimensions.
set_params(**params)	Set the parameters of this estimator.
transform(X)	Transform each data slice with all possible estimators.

decision_function(X)

Estimate distances of each data slice to all hyperplanes.

Parameters

Xarray, shape (n_samples, nd_features, n_slices)

The training input samples. Each estimator outputs the distance to its hyperplane, e.g.: [estimators[ii].decision_function(X[..., ii]) for ii in range(n_estimators)]. The feature dimension can be multidimensional e.g. X.shape = (n_samples, n_features_1, n_features_2, n_estimators).

Returns

y_predarray, shape (n_samples, n_estimators, n_slices, n_classes * (n_classes-1) // 2)

The predicted values for each estimator.

Notes

This requires base_estimator to have a decision_function method.

fit(X, y, **fit_params)

Fit a series of independent estimators to the dataset.

Parameters

Xarray, shape (n_samples, nd_features, n_tasks)

The training input samples. For each data slice, a clone estimator is fitted independently. The feature dimension can be multidimensional e.g. X.shape = (n_samples, n_features_1, n_features_2, n_tasks).

yarray, shape (n_samples,) | (n_samples, n_targets)

The target values.

**fit_paramsdict of str -> object

Parameters to pass to the fit method of the estimator.

Returns

selfobject

Return self.

Examples using fit:

Decoding sensor space data with generalization across time and conditions

fit_transform(X, y, **fit_params)

Fit and transform a series of independent estimators to the dataset.

Parameters

Xarray, shape (n_samples, nd_features, n_tasks)

The training input samples. For each task, a clone estimator is fitted independently. The feature dimension can be multidimensional e.g. X.shape = (n_samples, n_features_1, n_features_2, n_estimators)

yarray, shape (n_samples,) | (n_samples, n_targets)

The target values.

**fit_paramsdict of str -> object

Parameters to pass to the fit method of the estimator.

Returns

y_predarray, shape (n_samples, n_tasks) | (n_samples, n_tasks, n_targets)

The predicted values for each estimator.

get_params(deep=True)

Get parameters for this estimator.

Parameters

deepbool, optional

If True, will return the parameters for this estimator and contained subobjects that are estimators.

Returns

paramsmapping of str to any

Parameter names mapped to their values.

predict(X)

Predict each data slice with all possible estimators.

Parameters

Xarray, shape (n_samples, nd_features, n_slices)

The training input samples. For each data slice, a fitted estimator predicts each slice of the data independently. The feature dimension can be multidimensional e.g. X.shape = (n_samples, n_features_1, n_features_2, n_estimators).

Returns

y_predarray, shape (n_samples, n_estimators, n_slices) | (n_samples, n_estimators, n_slices, n_targets)

The predicted values for each estimator.

predict_proba(X)

Estimate probabilistic estimates of each data slice with all possible estimators.

Parameters

Xarray, shape (n_samples, nd_features, n_slices)

The training input samples. For each data slice, a fitted estimator predicts a slice of the data. The feature dimension can be multidimensional e.g. X.shape = (n_samples, n_features_1, n_features_2, n_estimators).

Returns

y_predarray, shape (n_samples, n_estimators, n_slices, n_classes)

The predicted values for each estimator.

Notes

This requires base_estimator to have a predict_proba method.

score(X, y)

Score each of the estimators on the tested dimensions.

Parameters

Xarray, shape (n_samples, nd_features, n_slices)

The input samples. For each data slice, the corresponding estimator scores the prediction, e.g.: [estimators[ii].score(X[..., ii], y) for ii in range(n_slices)]. The feature dimension can be multidimensional e.g. X.shape = (n_samples, n_features_1, n_features_2, n_estimators).

yarray, shape (n_samples,) | (n_samples, n_targets)

The target values.

Returns

scorearray, shape (n_samples, n_estimators, n_slices)

Score for each estimator / data slice couple.

Examples using score:

Decoding sensor space data with generalization across time and conditions

set_params(**params)

Set the parameters of this estimator. The method works on simple estimators as well as on nested objects (such as pipelines). The latter have parameters of the form <component>__<parameter> so that it’s possible to update each component of a nested object. Returns ——- self

transform(X)

Transform each data slice with all possible estimators.

Parameters

Xarray, shape (n_samples, nd_features, n_slices)

The input samples. For estimator the corresponding data slice is used to make a transformation. The feature dimension can be multidimensional e.g. X.shape = (n_samples, n_features_1, n_features_2, n_estimators).

Returns

Xtarray, shape (n_samples, n_estimators, n_slices)

The transformed values generated by each estimator.

Examples using mne.decoding.GeneralizingEstimator

Decoding (MVPA)

Decoding sensor space data with generalization across time and conditions