[R] [R-pkgs] New Package fansi: ANSI Control Sequence Aware String Functions

fansi provides counterparts to the base string manipulation functions substr, strwrap, strtrim, strsplit, and n(z)char that account for ANSI CSI SGR control sequences.  ANSI CSI SGR control sequences [1] can be used to format text in terminals that support them. For example the control sequence

[R] [R-pkgs] Announcing 'unitizer': Interactive Unit Tests

`unitizer` is a unit testing framework for tests that produce non-trivial output. It is conceptually similar to using ".Rout.save" files, except we save the actual R objects and conditions, and we streamline the update/test/debug cycle via an interactive interface. A non-interactive mode is av

[R] [R-pkgs] New Package vetr: Enforce Structural Requirements for S3 Objects

`vetr` implements a declarative template-based approach to verify that objects meet structural requirements, and auto-composes error messages when they do not. This package is intended to simplify a more formal use of S3 objects. The template concept is borrowed from `vapply`: >> vet(numeric(1L),

[R] [R-pkgs] diffobj released to CRAN

diffobj provides tools to compare the visual representation of R objects using the Myer's diff algorithm: ## Example: > mx1 <- matrix(1:9, 3) > mx2 <- mx1[-2,] > diffPrint(mx1, mx2, format="raw") < mx1 > mx2 @@ 1,4 @@ @@ 1,3 @@ . [,1] [,2] [,3] [,1] [,2