Cross-Platform ‘zip’ Compression (zip)
Cross-Platform ‘zip’ Compression Library. A replacement for the ‘zip’ function, that does not require any additional external tools on any platform.

Permutation Tests for General Dependent Truncation (permDep)
Implementations of permutation approach to hypothesis testing for quasi-independence of truncation time and failure time. The implemented approaches are powerful against non-monotone alternatives and thereby offer protection against erroneous assumptions of quasi-independence. The proposed tests use either a conditional or an unconditional method to evaluate the permutation p-value. The conditional method was first developed in Tsai (1980) <doi:10.2307/2336059> and Efron and Petrosian (1992) <doi:10.1086/171931>. The unconditional method provides a valid approximation to the conditional method, yet computationally simpler and does not hold fixed the size of each risk sets. Users also have an option to carry out the proposed permutation tests in a parallel computing fashion.

Error Propagation for R Vectors (errors)
Support for painless automatic error propagation in numerical operations.

Create and Append a Data Dictionary for an R Dataset (dataMeta)
Designed to create a basic data dictionary and append to the original dataset’s attributes list. The package makes use of a tidy dataset and creates a data frame that will serve as a linker that will aid in building the dictionary. The dictionary is then appended to the list of the original dataset’s attributes. The user will have the option of entering variable and item descriptions by writing code or use alternate functions that will prompt the user to add these.

Best Subset Selection for Sparse Generalized Linear Model and Cox Model (BeSS)
An implementation of best subset selection in generalized linear model and Cox proportional hazard model via the primal dual active set algorithm. The algorithm formulates coefficient parameters and residuals as primal and dual variables and utilizes efficient active set selection strategies based on the complementarity of the primal and dual variables.

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