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caldist now deals better with uncalibrated
distributions (cc=0).C14toF14C now have more flexibility regarding rounding of
values. The default is no rounding.draw.CF to visualise the relationship
between 14C ages and their F values, and how ages with large errors
become skewed/asymmetric.contaminate) now have the option for a seed to be set.muck now not only returns the percentage
of contamination required to to from an observed age to a target one
(and an assumed F14C of the contamination). As an alternative, if the
percentage of contamination is known, then the required F14C of the
contamination can be returned.F14CtoC14 and C14toF14C can
now also be called with shorter names - FtoC and
CtoF, respectively.draw.ccurve now plots the title of the second axis
(when add.yaxis=TRUE).coverage which calculates to what degree a
distribution A is covered by (i.e., falls within) another distribution
B. This could be used to check for example how well an age estimate from
an age-model fits with a calibrated date. If both overlap, even if the
date has a much wider distribution than the model estimate, then the
coverage is high (even if the total overlap between the narrow and wider
distributions is much less than 100%).hpd.overlap which checks if any of the
highest posterior density (hpd) intervals of two distributions overlap.
Returns TRUE if any of the hpd ranges overlap, FALSE if not.fractions now calculates a combined age if
the weights, percentage carbon and ages of all fractions are
provided.find.shells and
map.shells functions. Use browse=TRUE.
Requires Internet connection.find.shells and map.shells functions
now also offer to plot a browsable maps of (current) ocean currents.
This to help interpret which shells would be most representative of
different ocean water masses. Requires Internet connection.adjust.fractionation and
adjust.background to correct for fractionation and
background values (still experimental).calibrate function now draws correctly when
is.pMC=TRUE.overlapping function can now calculate the overlap
between either radiocarbon ages or distributions (the latter should be
provided as lists).D14CtoC14 had a bug that misinterpreted
columns - should work better now.contaminate,
clean and muck plots.bins to provide the minimum number
of bins in a distribution before hpds are calculated. Any distributions
with fewer bins get recalculated using a narrower binsize (equating to
100 equally-spaced bins).span to calculate (calibrated)
time-spans between two radiocarbon dates.overlapping calculates to what degree two
calibrated dates are overlapping.realm-related functions, changed the
rounding procedure from signif to round.fromto that translates values into
different domains, and plots them.C14topMC where errors were not
calculated correctly.push.normal and push.gamma
to push a date to younger or older ages by adding/subtracting a normal
resp. gamma distribution.calibrate for very old
dates.clean,
contaminate and muck functions, using Monte
Carlo-based sampling.realm functions translating to D14C space
didn’t handle multiple entries well. This should work correctly
now.find.shells and map.shells now deal better
with missing mapping-related packages.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.
Health stats visible at Monitor.