| recipe.sf {tidysdm} | R Documentation |
Recipe for sf objects
Description
This method for recipes::recipe() handles the
case when x is an sf::sf object, as commonly
used in Species Distribution Model, and generates a spatial_recipe.
Usage
## S3 method for class 'sf'
recipe(x, ...)
spatial_recipe(x, ...)
Arguments
x |
An sf::sf data frame. |
... |
parameters to be passed to |
Details
recipes are not natively compatible with sf::sf objects. The problem is that
the geometry column of sf::sf objects is a list, which is incompatible with
the translation of formulae in recipe. This method strips the geometry
column from the data.frame and replaces it with a simple X and Y columns
before any further operations, thus allowing
the usual processing by recipe() to succeed (X and Y are give the role
of coords in a spatial recipe). When prepping and baking a spatial_recipe,
if a data.frame or tibble without coordinates is used as training or
new_data, dummy X and Y columns
are generated and filled with NAs.
NOTE that order matters! You need to use the syntax
recipe(x=sf_obj, formula=class~.) for the method to successfully detect
the sf::sf object. Starting with formula will fail.
Value
An object of class spatial_recipe, which is a derived version of
recipes::recipe , see
the manpage for recipes::recipe() for details.