R: Get focal values

focalValues {terra} | R Documentation

## Get focal values

### Description

Get a matrix in which each row had the focal values of a cell. These are the values of a cell and a rectangular window around it.

### Usage

    ## S4 method for signature 'SpatRaster'
    focalValues(x, w=3, row=1, nrows=nrow(x), fill=NA)

### Arguments

`x` | SpatRaster or SpatVector
`w` | window. The window can be defined as one (for a square) or two odd numbers (row, col); or with an odd sized matrix
`row` | positive integer. Row number to start from, should be between 1 and nrow(x)
`nrows` | positive integer. How many rows?
`fill` | numeric used as values for imaginary cells outside the raster

### Value

matrix

### Examples

    r <- rast(ncol=4, nrow=4, crs="+proj=utm +zone=1 +datum=WGS84")
    values(r) <- 1:ncell(r)
    focalValues(r)

[Package terra version 1.4-22 Index]