mvpa2.misc.data_generators.pure_multivariate_signal¶
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mvpa2.misc.data_generators.
pure_multivariate_signal
(patterns, signal2noise=1.5, chunks=None, targets=None)¶ Create a 2d dataset with a clear purely multivariate signal.
This is known is the XOR problem.
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Parameters: patterns: int :
Number of data points in each of the four dot clouds
signal2noise: float, optional :
Univariate signal pedestal.
chunks: array, optional :
Vector for chunk labels for all generated samples.
targets: list, optional :
Length-2 sequence of target values for both classes. If None, [0, 1] is used.