added checks, ttest and wilcoxon

[0xMuluh]

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[Copilot]

Pull request overview

This pull request adds two statistical testing methods for differential abundance analysis: Wilcoxon rank-sum test and t-test (Welch's and Student's variants). The implementation includes both getter functions that return test results and adder functions that store results directly in the object's metadata.

Key changes:

• Added getWilcoxon() / addWilcoxon() for non-parametric testing
• Added getTtest() / addTtest() for parametric testing
• Created unified internal DAA engine with error handling and p-value adjustment
• Comprehensive test suite with validation, robustness, and paired data tests

Reviewed changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated 12 comments.

Show a summary per file

File	Description
vignettes/daa.Rmd	Simplified vignette with examples of the new Wilcoxon and t-test methods
README.md / README.Rmd	Updated documentation to describe available methods and usage
R/AllGenerics.R	Defines S4 generics for the new statistical testing functions
R/utils.R	Implements input validation, data extraction, and unified DAA engine
R/getWilcoxon.R	Implements Wilcoxon rank-sum test with S4 methods
R/getTtest.R	Implements t-test with S4 methods and var.equal parameter
tests/testthat/test-*.R	Comprehensive test coverage for utility functions and both statistical methods
DESCRIPTION	Updated dependencies and RoxygenNote version
NAMESPACE	Auto-generated exports for new functions
man/*.Rd	Auto-generated documentation files

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