Raster to point conversion. Cells with NA are not converted. A function can be used to select a subset of the raster cells (by their values).
rasterToPoints(x, fun=NULL, spatial=FALSE, ...)
Arguments
- x
A Raster* object
- fun
Function to select a subset of raster values
- spatial
Logical. If TRUE, the function returns a SpatialPointsDataFrame object
- ...
Additional arguments. Currently only progress to specify a progress bar. "text", "window", or "" (the default, no progress bar)
Details
fun should be a simple function returning a logical value.
E.g.: fun=function(x){x==1} or fun=function(x){x>3}
Value
A matrix with three columns: x, y, and v (value), or a SpatialPointsDataFrame object
Examples
r <- raster(nrow=18, ncol=36)
values(r) <- runif(ncell(r)) * 10
r[r>8] <- NA
p <- rasterToPoints(r)
p <- rasterToPoints(r, fun=function(x){x>6})
#plot(r)
#points(p)