
The primary objective of the 元C was to focus on the prognostic problem by developing artificial intelligence/machine learning (AI/ML) models and algorithms that serve as open-source tools for using structured medical records to identify which patients infected with SARS-CoV-2 have a high likelihood of developing PASC/Long COVID. The 元C complements the NIH’s other Long COVID research initiatives, like Researching COVID to Enhance Recovery (RECOVER). This is evidently 32-bit as it is disabled on my Mac under OS 10.14.In August 2022, the Rapid Acceleration of Diagnostics Radical (RADx®-rad) program at the National Institutes of Health (NIH) launched the Long COVID Computational Challenge (元C) to support creative data-driven solutions that meaningfully advance the current understanding of the risks of developing post-acute sequelae of SARS-Co-V2 (PASC)/Long COVID. The version of RSwitch.app noted in the question is still available via a link from this page. pkg files the awkward workaround is to use Control/right/two-finger click on the file in the Finder, then select ‘Open With’ and ‘Installer’ from the menu that appears.

With security settings in MacOS you might have trouble opening some R. pkg won't overwrite a newer version but in that case it might be safest to omit any attempt to instal older Tcl/Tk and Texinfo, selectable with the "Customize" button at the "Installation Type" stage of the installation.

(I've had trouble installing from a tarball instead might just be my incompetence.) Installing an older version from a. You can use the command pkgutil -forget (path to package name)

pkg via GUI to install a newer version of R it will effectively forget the other versions. (I've had trouble with the newest Mac GUI not working with R 3.6.3 but RStudio seems to work fine with both that and R 4.0.1 along with this RSwitch.app.) The help pages for Rswitch show what's going on underneath, if you prefer to work via a command line. You can choose which of your R builds to use, integrating with the standard Mac GUI and with RStudio. There is an RSwitch.app available for MacOS 10.14+ that provides this functionality via a menu bar app. This old question is again timely, with the move to R version 4.
