extent: Extent In raster: Geographic Data Analysis and Modeling

Description

This function returns an Extent object of a Raster* or Spatial* object (or an Extent object), or creates an Extent object from a 2x2 matrix (first row: xmin, xmax; second row: ymin, ymax), vector (length=4; order= xmin, xmax, ymin, ymax) or list (with at least two elements, with names 'x' and 'y')

`bbox` returns a `sp` package like 'bbox' object (a matrix)

Usage

 `1` ```extent(x, ...) ```

Arguments

 `x` Raster* or Extent object, a matrix, or a vector of four numbers `...` Additional arguments. When x is a single number representing 'xmin', you can pass three additional numbers (xmax, ymin, ymax) When `x` is a Raster* object, you can pass four additional arguments to crop the extent: `r1, r2, c1, c2`, representing the first and last row and column number

Extent object

Author(s)

Robert J. Hijmans; Etienne Racine wrote the extent function for a list

See Also

`extent`, `drawExtent`

Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11``` ```r <- raster() extent(r) extent(c(0, 20, 0, 20)) #is equivalent to extent(0, 20, 0, 20) extent(matrix(c(0, 0, 20, 20), nrow=2)) x <- list(x=c(0,1,2), y=c(-3,5)) extent(x) #crop the extent by row and column numbers extent(r, 1, 20, 10, 30) ```

raster documentation built on Nov. 17, 2017, 5:51 a.m.