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mvpa2.base.dataset.DatasetAttributeExtractor

class mvpa2.base.dataset.DatasetAttributeExtractor(col, key)

Helper to extract arbitrary attributes from dataset collections.

Examples

>>> ds = AttrDataset(np.arange(12).reshape((4,3)),
...              sa={'targets': range(4)},
...              fa={'foo': [0,0,1]})
>>> ext = DAE('sa', 'targets')
>>> ext(ds)
array([0, 1, 2, 3])

>>> ext = DAE('fa', 'foo')
>>> ext(ds)
array([0, 0, 1])

Parameters :

col : {‘sa’, ‘fa’, ‘a’}

The respective collection to extract an attribute from.

key : arbitrary

The name/key of the attribute in the collection.