Having dropped the dependencies to the package "sp", the current version of IsoriX does not allow for adding a mask of oceans that works well everywhere on earth.
I did not notice that issue until I started to work on the bookdown since examples embedded in the package focus on Europe and by chance, it works there.
This will soon be solved thanks to work in "lattice" and "rasterVis".
Having dropped the dependencies to the package "sp", the current version of IsoriX does not allow for adding a mask of oceans that works well everywhere on earth.
I did not notice that issue until I started to work on the bookdown since examples embedded in the package focus on Europe and by chance, it works there.
This will soon be solved thanks to work in "lattice" and "rasterVis".
See:
The issue stems from the lack of native support for plotting polygons with holes in "lattice".