NEWS.md
In joeroe/c14: Tidy Radiocarbon Data

c14 development version

Revised the definition of the cal class, representing calibrated radiocarbon dates:
cal is now a vctrs::list_of subclass; a list of two-column data frames representing the probability distribution
The age column of a cal element is now an era::yr vector.
"Metadata" has been removed from the class definition
Added summary functions for calibrated dates (cal class):
cal_point() for point estimates
cal_age_range(), cal_age_min(), and cal_age_max() for simple ranges
Added aggregation functions for for calibrated dates (cal class):
cal_sum() for summed probability
cal_density() for composite kernel density estimation
Added classes, functions and datasets for calibration curves:
c14_curve is a vctrs record class representing a calibration curve, with subclasses c14_curve_14c and c14_curve_f14c for CRA-based and F14C-based records respectively.
c14_curve() constructs a c14_curve_14c object
c14_fcurve() constructs a c14_curve_f14c object
read_14c() reads .14c and .f14c files
?c14_curves: exported datasets for the IntCal20, SHCal20, Marine20, IntCal13, SHCal13, Marine13, IntCal09, Marine09, IntCal04, SHCal04, Marine04, IntCal98, and Marine98 curves.
Added functions and datasets for working with radiocarbon measurements:
c14_age() for calculating a radiocarbon age from fraction modern.
c14_f14c() for reverse-calculating fraction modern from a radiocarbon age.
Decay constants c14_decay_libby and c14_decay_cambridge.
Added example datasets ppnd and shub1_c14