r - rgdal::readOGR versus readOGR namespace issue? -

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i trying load shapefile using the rgdal package. why command fails:

plot(rgdal::readogr(dsn=system.file("vectors/up.tab", package = "rgdal")[1],layer="up"))

with error:

error in as.double(y) : cannot coerce type 's4' vector of type 'double'

while 1 suceeds

library(rgdal) plot(readogr(dsn=system.file("vectors/up.tab", package = "rgdal")[1],layer="up"))

my guess is has hidden plot method spatialgdal. how uncover going on behind scenes plot ?

i trying call readogr after "importing" rgdal within package writing. in effort avoid namespace conflicts using importfrom rgdal readogr.


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