unroll: Unroll Genetic Horizons

In aqp: Algorithms for Quantitative Pedology

Unroll Genetic Horizons

Description

Generate a discretized 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 which missing data is padded with NA
bottom_padding_value	value to use when padding missing data
strict	should horizons be strictly checked for self-consistency? defaults to FALSE

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. The max_depth argument is used to specify the maximum depth of profiles within a collection, so that data from any profile shallower than this depth is padded with NA.

Value

a vector of "unrolled" property values

Author(s)

Dylan E. Beaudette

References

https://casoilresource.lawr.ucdavis.edu/

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)

aqp documentation built on Oct. 19, 2024, 5:06 p.m.