mvpa2.testing.datasets.pure_multivariate_signal

mvpa2.testing.datasets.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.