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contaminate function now also produces a plot, and
more details of the calculations.decontaminate function has been renamed to
clean and has been updated with clearer messages; it now
removes contamination to calculate the true/target age. A plot is made,
and calculation details are provided.muck to calculate how much contamination
has to be inferred to go from an observed age to a true/target age. A
plot is made, and calculation details are provided.C14tocalBP and C14toBCAD.
Since these rely on the outdated ‘intercept calibration’ method, these
functions are provided for illustrative purposes only.oncurve option. If so, then the curve and dates
can also be plotted in the F14C or pMC
realms.r.calib that samples random calendar ages
from a calibrated distribution.p.range to calculate a calibrated age’s
probability of lying between a range of BC/AD or cal BP ages.as.one to calculate the product of
multiple calibrated ages, assuming that they all stem from (exactly) the
same calendar age. Not that this is dangerous, and care should be taken
to make sure that the assumptions are met.as.bin to calculate how many of a set of
calibrated radiocarbon dates fall into bins of a specified width. The
bin moves along the range of calibrated ages, to visualise how many
dates fit bins over time. This would be safer than using the function
as.one.spread shows the spread (in calendar
years) of a set of dates. Accompanies the functions pool
and as.one.BCADto14C to calculate the 14C age
belonging to a BC/AD age (this calls the function
calBPto14C)as.F to calibrate in the F14C realm (the
default remains to calibrate in the C14 realm)print.truncate.warning=FALSEage.F14C, F14C.age,
age.pMC and pMC.age to, respectively,
C14toF14C, F14CtoC14, C14topMC
and pMCtoC14. This because age is an
ambivalent term in this contextBCADtocalBP and calBPtoBCAD
to transfer cal BP into BC/AD ages and vice versa. Can deal with
(e.g. Gregorian/Julian) calendars which do not include 0calBP, BCAD, C14,
F14C, pMC and D14C.smooth.ccurve to smooth a calibration
curve using a moving window of a specified width. This can be useful to
calibrate material that is known to have accumulated, say, over two
decadespool which calculates the chi2 and
accompanying p-value for a set of multiple measurements on the same
sample. If the scatter between the values is low enough for the p-value
to be below a threshold, then the pooled mean and uncertainty are
returnedoncurve to
draw the dates onto the calibration curve.shroud, which contains replicate
radiocarbon measurements on the Shroud of Turin, from three labs.decontaminate to estimate the percentage
of contamination needed to explain the difference between a ‘real’ and
an ‘observed’ radiocarbon age.bombalert to the calibrate function. If
set to false, plots ages close to 0 C14 BP without warnings.shellsfind.shells and map.shells
to plot shells data in maps based on their coordinatesshells.mean to plot deltaRs of selected
shells, and calculate a weighted mean deltaRweighted_means to calculate weighted means
and errors for multiple radiocarbon dates (or delta R values)draw.D14Cdraw.ccurve now can plot the C14 in the ‘realms’ of C14
BP, F14C, pMC and D14C using the ‘realm’ option.olderThese binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.