Initialize a SoilProfileCollection from a data.frame object
# S4 method for SoilProfileCollection
depths(object) <- value# S4 method for data.frame
depths(object) <- value
An object to promote to SoilProfileCollection (inherits from data.frame)
A formula specifying the unique profile ID, top and bottom depth column names
# NOT RUN {
## init SoilProfileCollection objects from data.frame of horizon data
# load demo data
data(sp1)
# promote to SPC
depths(sp1) <- id ~ top + bottom
# plot
plot(sp1)
# number of profiles
length(sp1)
# number of horizons
nrow(sp1)
# }
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