Computes pairwise correlations between the two data splits in half.
Reported as one minus a correlation over two to provide a dissimilarity measure between 0 and 1 as in svm().
Data is normalized by subtracting the mean across conditions (targets) per chunk per voxel.
| Args: | evds (event-related mvpa dataset) |
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| Kwargs: |
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| Returns: |
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