1d:T525,# Select parts of a polygon GVector erase shared by another polygon GVector The `erase()` function removes from the `x` "polygons" `GVector` parts that overlap with the `y` "polygons" `GVector`. You can also use the `-` operator (e.g., `vect1 - vect2`). ```r ## S4 method for signature 'GVector,GVector' erase(x, y) ``` ## Arguments - `x, y`: `GVector`s. ## Returns A `GVector`. ## Examples ```r if (grassStarted()) { # Setup library(sf) # Polygon of coastal Madagascar and Dypsis specimens madCoast4 <- fastData("madCoast4") # polygons madDypsis <- fastData("madDypsis") # points # Convert vectors: coast4 <- fast(madCoast4) dypsis <- fast(madDypsis) # Create another polygons vector from a convex hull around Dypsis points hull <- convHull(dypsis) ### union() unioned <- union(coast4, hull) plot(unioned) plus <- coast4 + hull # same as union() ### intersect inter <- intersect(coast4, hull) plot(coast4) plot(hull, border = "red", add = TRUE) plot(inter, border = "blue", add = TRUE) ### xor xr <- xor(coast4, hull) plot(coast4) plot(xr, border = "blue", add = TRUE) ### erase erased <- erase(coast4, hull) plot(coast4) plot(erased, border = "blue", add = TRUE) minus <- coast4 - hull # same as erase() } ``` ## See Also `c()`, `aggregate()`, `crop()`, `intersect()`, `union()`, `xor()`1e:T49a,M7.49933 0.25C3.49635 0.25 0.25 3.49593 0.25 7.50024C0.25 10.703 2.32715 13.4206 5.2081 14.3797C5.57084 14.446 5.70302 14.2222 5.70302 14.0299C5.70302 13.8576 5.69679 13.4019 5.69323 12.797C3.67661 13.235 3.25112 11.825 3.25112 11.825C2.92132 10.9874 2.44599 10.7644 2.44599 10.7644C1.78773 10.3149 2.49584 10.3238 2.49584 10.3238C3.22353 10.375 3.60629 11.0711 3.60629 11.0711C4.25298 12.1788 5.30335 11.8588 5.71638 11.6732C5.78225 11.205 5.96962 10.8854 6.17658 10.7043C4.56675 10.5209 2.87415 9.89918 2.87415 7.12104C2.87415 6.32925 3.15677 5.68257 3.62053 5.17563C3.54576 4.99226 3.29697 4.25521 3.69174 3.25691C3.69174 3.25691 4.30015 3.06196 5.68522 3.99973C6.26337 3.83906 6.8838 3.75895 7.50022 3.75583C8.1

erase function