R: Is the input a raster?

assert_is_raster {assertive.types}

R Documentation

Is the input a raster?

Description

Checks to see if the input is a raster.

Usage

assert_is_raster(x, severity = getOption("assertive.severity", "stop"))

is_raster(x, .xname = get_name_in_parent(x))

Arguments

`x`	Input to check.
`severity`	How severe should the consequences of the assertion be? Either `"stop"`, `"warning"`, `"message"`, or `"none"`.
`.xname`	Not intended to be used directly.

Value

is_raster wraps is.raster, providing more information on failure. is_a_raster returns TRUE if the input is raster and scalar. The assert_* functions return nothing but throw an error if the corresponding is_* function returns FALSE.

Examples

m <- matrix(hcl(0, 80, seq(50, 80, 10)), nrow=4, ncol=5)
assert_is_raster(as.raster(m))
## Not run: 
#These examples should fail.
assert_is_raster(m)

## End(Not run)