Class "SpatialMultiPointsDataFrame"

Class for spatial attributes that correspond to point sets

# S4 method for SpatialMultiPointsDataFrame
[(x, i, j, ..., drop = TRUE)
  # S4 method for SpatialMultiPointsDataFrame,data.frame
coerce(from, to, strict=TRUE)
  # S4 method for SpatialMultiPointsDataFrame
coordinates(obj)
  # S4 method for SpatialMultiPointsDataFrame
show(object)
  # S4 method for SpatialMultiPointsDataFrame
points(x)

Slots

data:

Object of class data.frame containing the attribute data (may or may not contain the coordinates in its columns)

coords:

Object of class "list"; the list with coordinates matrices; points are rows in the matrix, the list length equals the number of rows in the data slot

bbox:

Object of class "matrix"; bounding box

proj4string:

Object of class "CRS"; projection string

Extends

Class "SpatialMultiPoints", directly. Class "Spatial", by class "SpatialMultiPoints".

Arguments

x,from,obj,object

SpatialMultiPointsDataFrame object

to

class to which to coerce

strict

see as

i

row indices

j

column indices

drop

see Extract

...

indices passed through

Author

Edzer Pebesma, edzer.pebesma@uni-muenster.de

Examples

# create three sets of points:
cl1 = cbind(rnorm(3, 10), rnorm(3, 10))
cl2 = cbind(rnorm(5, 10), rnorm(5,  0))
cl3 = cbind(rnorm(7,  0), rnorm(7, 10))

mpdf = SpatialMultiPointsDataFrame(list(cl1, cl2, cl3), data.frame(a = 1:3))
mpdf
#>                coordinates a
#> 1     (9.561015, 10.40916) 1
#> 1.1    (9.27168, 9.775527) 1
#> 1.2   (11.16353, 10.06249) 1
#> 2   (6.999186, -0.5318854) 2
#> 2.1  (9.114098, 0.9131392) 2
#> 2.2  (9.244407, 0.4187773) 2
#> 2.3 (11.63942, 0.04003302) 2
#> 2.4    (9.73929, 2.470472) 2
#> 3     (2.084812, 9.650787) 3
#> 3.1  (0.7406445, 10.24091) 3
#> 3.2 (-0.4293515, 10.51667) 3
#> 3.3  (0.1892378, 11.10769) 3
#> 3.4 (-0.5419215, 9.132698) 3
#> 3.5   (-2.11942, 10.00115) 3
#> 3.6 (-0.1641934, 10.40547) 3

plot(mpdf, col = mpdf$a, cex = 1:3)

as(mpdf, "data.frame")
#>              X1          X2 index a
#> X1    9.5610153 10.40915822     1 1
#> X1.1  9.2716802  9.77552745     1 1
#> X1.2 11.1635273 10.06248677     1 1
#> X2    6.9991860 -0.53188536     2 2
#> X2.1  9.1140978  0.91313918     2 2
#> X2.2  9.2444070  0.41877727     2 2
#> X2.3 11.6394230  0.04003302     2 2
#> X2.4  9.7392898  2.47047235     2 2
#> X3    2.0848116  9.65078723     3 3
#> X3.1  0.7406445 10.24090914     3 3
#> X3.2 -0.4293515 10.51666727     3 3
#> X3.3  0.1892378 11.10769222     3 3
#> X3.4 -0.5419215  9.13269831     3 3
#> X3.5 -2.1194197 10.00114595     3 3
#> X3.6 -0.1641934 10.40547209     3 3
mpdf[1:2,]
#>                coordinates a
#> 1     (9.561015, 10.40916) 1
#> 1.1    (9.27168, 9.775527) 1
#> 1.2   (11.16353, 10.06249) 1
#> 2   (6.999186, -0.5318854) 2
#> 2.1  (9.114098, 0.9131392) 2
#> 2.2  (9.244407, 0.4187773) 2
#> 2.3 (11.63942, 0.04003302) 2
#> 2.4    (9.73929, 2.470472) 2