S4 class object for creating and managing group sequential designs. It calculates the efficacy and futility boundaries at each look. It allows modifying the design and tracking the design update history.
|Author||David A Schoenfeld, PhD and Hui Zheng, PhD|
|Maintainer||Hui Zheng <[email protected]>|
|License||MIT + file LICENSE|
|Package repository||View on CRAN|
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