SpatialLines-class {sp} | R Documentation |
a class that holds spatial lines
hold a list of Lines objects; each Lines object holds a list of Line (line) objects.
lines
:Object of class "list"
; list members are all of
class Lines-class
bbox
:Object of class "matrix"
; see Spatial-class
proj4string
:Object of class "CRS"
; see CRS-class
Class "Spatial"
, directly.
signature(obj = "SpatialLines")
: select subset of (sets of) lines; NAs are not permitted in the row index
value is a list of lists with matrices
signature(x = "SpatialLines", y = "missing")
:
plot lines in SpatialLines object
signature(x = "SpatialLines")
:
add lines in SpatialLines object to a plot
signature(object = "SpatialLines")
:
rbind-like method, see notes
signature(object = "SpatialLines")
:
summarize object
rbind
calls the function SpatialLines
, where it is
checked that all IDs are unique. If rbind
-ing SpatialLines
without
unique IDs, it is possible to set the argument makeUniqueIDs = TRUE
, although
it is preferred to change these explicitly with spChFIDs
.
Roger Bivand, Edzer Pebesma
# from the sp vignette: l1 = cbind(c(1,2,3),c(3,2,2)) l1a = cbind(l1[,1]+.05,l1[,2]+.05) l2 = cbind(c(1,2,3),c(1,1.5,1)) Sl1 = Line(l1) Sl1a = Line(l1a) Sl2 = Line(l2) S1 = Lines(list(Sl1, Sl1a), ID="a") S2 = Lines(list(Sl2), ID="b") Sl = SpatialLines(list(S1,S2)) summary(Sl) plot(Sl, col = c("red", "blue"))