[R-pkg-devel] Explicitly Calling a Method of a specific Class in a Function

[Roger Bivand]

(apologies for out-of-thread response)

Both plot() and SpatialPolygons are S4, so see:

https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Namespaces-with-S4-classes-and-methods

for guidance, probably

importClassesFrom(sp, SpatialPolygons)
importMethodsFrom(sp, plot)

(untried), and list sp in Imports in DESCRIPTION.

Roger

-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
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