There are currently no open bugs.

"r-cran-backports" versions published in Ubuntu

Lunar (1.4.1-1): universe/misc
Kinetic (1.4.1-1): universe/misc
Jammy (1.4.1-1): universe/misc
Focal (1.1.5-1): universe/misc
Bionic (1.1.1-1): universe/misc