format_slices: Format Depth Slices of a Soil Profile
Description
This function constructions a list of spatial data frames from soil profile data that has
already been 'sliced' into regular depth intervals.
Usage
format_slices(data, crs, depths, variable = NULL)
Arguments
data
a dataframe containing at least: x and y coordinates, and some soil data
crs
a CRS object that is to be assigned to each depth slice SPDF
depths
a vector of depth slices to return
variable
the name of a variable in 'data' that is used to filter out points in
space when this variable is NA (optional)
Value
A list of SPDF slices are returned, with elements representing each reqested slice in 'depths'.
Details
If the resulting SPDF are to be used for geostatistical interpolation or simulation, it is necessary to supply an argument for 'variable', such that points in space where that variable is NA will be removed.