[R-sig-Geo] extract lat-long pairs from sf::st_read MULTIPOLYGON format

[Brandon Payne]

Roman,

I am looking for advice on how to convert one (extra, missing, not-included) region from the shape file
"ISR_adm1.shp" @ "http://biogeo.ucdavis.edu/data/diva/adm/ISR_adm.zip", 

into that ( https://github.com/trulia/choroplethrAdmin1/blob/master/data/admin1.map.rdata ) data frame format.