alipy.query_strategy.multi_labels.
QueryMultiLabelRandom
Select instance or instance-label pairs randomly.
Methods
select
select(self, label_index, unlabel_index, batch_size=1, select_type='ins-lab', **kwargs)
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Parameters:
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X: 2D array
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Feature matrix of the whole dataset. It is a reference which will not use additional memory.
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y: array-like
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Label matrix of the whole dataset. It is a reference which will not use additional memory.
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lambda: float, optional (default=1.0)
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A regularization parameter used in the regularization learning
framework.
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kernel : {'linear', 'poly', 'rbf', callable}, optional (default='rbf')
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Specifies the kernel type to be used in the algorithm.
It must be one of 'linear', 'poly', 'rbf', or a callable.
If a callable is given it is used to pre-compute the kernel matrix
from data matrices; that matrix should be an array of shape
``(n_samples, n_samples)``.
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degree : int, optional (default=3)
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Degree of the polynomial kernel function ('poly').
Ignored by all other kernels.
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gamma : float, optional (default=1.)
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Kernel coefficient for 'rbf', 'poly'.
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coef0 : float, optional (default=1.)
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Independent term in kernel function.
It is only significant in 'poly'.
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select
select(self, label_index, unlabel_index, **kwargs)
Select a subset from the unlabeled set, return the selected instance and label.
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Parameters:
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label_index: {list, np.ndarray, MultiLabelIndexCollection}
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The indexes of labeled samples. It should be a 1d array of indexes (column major, start from 0) or
MultiLabelIndexCollection or a list of tuples with 2 elements, in which,
the 1st element is the index of instance and the 2nd element is the index of labels.
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unlabel_index: {list, np.ndarray, MultiLabelIndexCollection}
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The indexes of unlabeled samples. It should be a 1d array of indexes (column major, start from 0) or
MultiLabelIndexCollection or a list of tuples with 2 elements, in which,
the 1st element is the index of instance and the 2nd element is the index of labels.
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Returns:
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selected_ins_lab_pair: list
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A list of tuples that contains the indexes of selected instance-label pairs.
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