Analysis

Boreholes

cumulative_thickness(data[, top, bottom])
find_top_sand(lith, top, bottom, ...)	Find the top of sand depth in a borehole.
layer_top(data, column, value)
top_of_sand(boreholes[, ids, min_sand_frac, ...])

Cpts

interpret_cpt.calc_ic(qc, rf)	Calculate non-normalized IC values (I_SBT in Robertson 2010).
interpret_cpt.calc_lithology(ic, qc, rf)