Create vrt blocks with derived bands. — vrt_derived_block • vrtility

Create new vrt blocks containing derived expression bands.

Usage

vrt_derived_block(x, ...)

Arguments

x: a vrt_block or vrt_collection object.
...: named R formulas for new bands to create. Formula variable names must the names of existing bands in the vrt_block object. the argument name is used to name the new (derived) band.

Value

A modified vrt_block or vrt_collection containing the new derived expression bands.

Examples

if (FALSE) { # check_muparser()
s2files <- fs::dir_ls(system.file("s2-data", package = "vrtility"))

ex_collect <- vrt_collect(s2files[1])

ex_ndvi <- vrt_derived_block(
  ex_collect,
  ndvi ~ (B08 - B04) / (B08 + B04)
)
plot(ex_ndvi)
}