SpatialMultiPointsDataFrame-class {sp} | R Documentation

## Class "SpatialMultiPointsDataFrame"

### Description

Class for spatial attributes that correspond to point sets

### Usage

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

### 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

### 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"`.

### Author(s)

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

### See Also

`coordinates`, `SpatialMultiPoints-class`

### 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

    plot(mpdf, col = mpdf$a, cex = 1:3)
    as(mpdf, "data.frame")
    mpdf[1:2,]

[Package sp version 1.2-2 Index]