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. Author manuscript; available in PMC: 2013 Dec 30.
Published in final edited form as: JMLR Workshop Conf Proc. 2012;22:246–254.

Figure 3.

Figure 3

Permutation testing using the proposed method compared against the direct IRLS method for the EEG and fMRI datasets and various numbers of permutations P. The effective problem size represents the number of permutations that can be solved by the direct method in the same time as the entire set of P permutations by our proposed approach. Here, the ratio of number of permutations P to the effective problem size gives the computational speedup.