Evaluate an expression in another R session — r

From callr version 2.0.0, r() is equivalent to r_safe(), and tries to set up a less error prone execution environment. In particular: Ensures that at least one reasonable CRAN mirror is set up. Adds some command line arguments to avoid saving .RData files, etc. Ignores the system and user profiles (by default). Sets various environment variables: CYGWIN to avoid warnings about DOS-style paths, R_TESTS to avoid issues when callr is invoked from unit tests, R_BROWSER and R_PDFVIEWER to avoid starting a browser or a PDF viewer. See rcmd_safe_env().