Spatial filtering

SpatialFilter(w[, method, method_params, ...])	Convenience wrapper around a NumPy array that contains the weights of the spatial filter for each data channel.
apply_batch(data, filters[, ch_names])	Apply a set of spatial filters to the provided data.
apply_batch_raw(raw, filters)	Apply of a set of spatial filters to a Raw dataset.
dot(sf1, sf2[, normalize])	Compute the dot product / cosine similarity of two spatial filters.