extractRange: Extract values for a range of layers from a SpatRaster

In terra: Spatial Data Analysis

Extract values for a range of layers from a SpatRaster

Description

Extract values from a SpatRaster for a set of locations and a range of layers. To extract values for a single or all layers, use extract

Usage

## S4 method for signature 'SpatRaster'
extractRange(x, y, first, last, lyr_fun=NULL, 
		geom_fun=NULL, ID=FALSE, na.rm=TRUE, ...)

Arguments

x	SpatRaster
y	SpatVector (points, lines, or polygons). Alternatively, for points, a 2-column matrix or data.frame (x, y) or (lon, lat). Or a vector with cell numbers
first	layer name of number, indicating the first layer in the range of layers to be considered
last	layer name or number, indicating the last layer in the range to be considered
lyr_fun	function to summarize the extracted data across layers
geom_fun	function to summarize the extracted data for each line or polygon geometry. Ignored if y has point geometry
ID	logical. Should an ID column be added? If so, the first column returned has the IDs (record numbers) of y
na.rm	logical. Should missing values be ignored?
...	additional arguments passed to extract

Value

numeric or data.frame

See Also

extract

Examples

r <- rast(system.file("ex/logo.tif", package="terra"))   
xy <- data.frame(c(50,80), c(30, 60))
extract(r, xy)
extract(r, xy, layer=c("red", "green"))
extractRange(r, xy, first=1:2, last=3:2, lyr_fun=sum)

terra documentation built on Oct. 14, 2024, 5:07 p.m.