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Lots and lots of minor bug fixes
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Added several (some modified) vignettes for clarity on the underlying algorithm and utility of the package (see the package website)
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Reversed the ADMM algorithm sequence -- which improves computation speed
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ADMMsigma is a major version release and total re-work of the original package.
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Updates include further parallel computing capabilities, automatic selection of tuning parameter grid, and updated graphics. Many options for "ADMMsigma" have been added and/or re-named. Please refer to the manual for more detailed information.