cells | R Documentation |
Get the cell numbers covered by a SpatVector or SpatExtent. Or that match values in a vector; or all non NA
values.
## S4 method for signature 'SpatRaster,missing' cells(x, y) ## S4 method for signature 'SpatRaster,numeric' cells(x, y) ## S4 method for signature 'SpatRaster,SpatVector' cells(x, y, method="simple", weights=FALSE, exact=FALSE, touches=is.lines(y)) ## S4 method for signature 'SpatRaster,SpatExtent' cells(x, y)
x |
SpatRaster |
y |
SpatVector, SpatExtent, 2-column matrix representing points, numeric representing values to match, or missing |
method |
character. Method for getting cell numbers for points. The default is "simple", the alternative is "bilinear". If it is "bilinear", the four nearest cells and their weights are returned |
weights |
logical. If |
exact |
logical. If |
touches |
logical. If |
numeric vector or matrix
r <- rast(ncols=10, nrows=10) values(r) <- 1:ncell(r) r[c(1:25, 31:100)] <- NA r <- ifel(r > 28, r + 10, r) # all cell numbers of cells that are not NA cells(r) # cell numbers that match values x <- cells(r, c(28,38)) x$lyr.1 # cells for points m <- cbind(x=c(0,10,-30), y=c(40,-10,20)) cellFromXY(r, m) v <- vect(m) cells(r, v) cells(r, v, method="bilinear") # cells for polygons f <- system.file("ex/lux.shp", package="terra") v <- vect(f) r <- rast(v) cv <- cells(r, v)
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