aqp (version 0.97)

unroll: Unroll Genetic Horizons

Description

Generate a descretized vector of genetic horizons along a user-defined pattern.

Usage

unroll(top, bottom, prop, max_depth, bottom_padding_value = NA, strict=FALSE)

Arguments

top

vector of upper horizon boundaries, must be an integer

bottom

vector of lower horizon boundaries, must be an integer

prop

vector of some property to be "unrolled" over a regular sequence

max_depth

maximum depth to consider

bottom_padding_value

value to use when padding missing data

strict

should horizons be strictly checked for self-consistency? defaults to FALSE

Value

• a vector of "unrolled" property values

Details

This function is used internally by several higher-level components of the aqp package. Basic error checking is performed to make sure that bottom and top horizon boundaries make sense. Note that the horizons should be sorted according to depth before using this function.

References

http://casoilresource.lawr.ucdavis.edu/

See Also

soil.slot

Examples

data(sp1)

# subset a single soil profile:
sp1.1 <- subset(sp1, subset=id == 'P001')

# demonstrate how this function works
x <- with(sp1.1, unroll(top, bottom, prop, max_depth=50))
plot(x, 1:length(x), ylim=c(90,0), type='b', cex=0.5)