# Initialize a SpatRaster with values

`init.Rd`

Create a SpatRaster with values reflecting a cell property: "x", "y", "col", "row", "cell" or "chess". Alternatively, a function can be used. In that case, cell values are initialized without reference to pre-existing values. E.g., initialize with a random number (`fun=runif`

). While there are more direct ways of achieving this for small objects (see examples) for which a vector with all values can be created in memory, the `init`

function will also work for SpatRasters with many cells.

## Arguments

- x
SpatRaster

- fun
function to be applied. This must be a either single number, multiple numbers, a function, or one of a set of known character values. A function must take the number of cells as a single argument to return a vector of values with a length equal to the number of cells, such as

`fun=runif`

. Allowed character values are "x", "y", "row", "col", "cell", and "chess" to get the x or y coordinate, row, col or cell number or a chessboard pattern (alternating 0 and 1 values)- filename
character. Output filename

- ...
additional arguments for writing files as in

`writeRaster`

## Examples

```
r <- rast(ncols=10, nrows=5, xmin=0, xmax=10, ymin=0, ymax=5)
x <- init(r, fun="cell")
y <- init(r, fun=runif)
# initialize with a single value
z <- init(r, fun=8)
```