Name
±
Curve


Interface build:
(c) Christopher Bronk Ramsey

This menu allows you to perform single radiocarbon calibrations. Enter the:

  • Name: sample descriptor
  • Date/F14C: readiocarbon determination
  • ±: the standard uncertainty

Specific atmospheric curves can be selected. See help on calibration curves.

For marine curves, resolution settings and reservoir effects see [Options]

Further options are:

  • View curve: plot the curve
  • Projects...: for multiplots and Bayesian analysis
  • New: opens a new input window
  • Open: opens a file
  • Close: closes window (without saving)
  • Save as: saves plot or table
  • Manager: opens file manager window
  • Reset: resets all settings
  • Change password: changes password and details
  • Logout: logs out from server

Select required view:

  • Table: tabulated ranges and links to other information
  • Plot single: single plot showing calibration and/or posteriors
  • Plot dates: plots with many date distributions on each page (as selected)
  • Plot intervals: plots with many interval distributions on each page (as selected)
  • Plot parameters: plots with many parameter distributions on each page (as selected)
  • Plot selected: same as multiple plot but in the order they were selected
  • Plot stacked: multiple distributions on same line
  • Plot on curve: plots the data against radiocarbon calibration curve
  • Plot vs depth: plots showing distributions against z position on the vertical axis
  • Plot on map: plot longitude/latitude tagged data on a map
  • Model specification: mathematical details of model
  • Model schematic: schematic diagram of model
  • Raw data: raw data from analysis
  • Log file: simple text output from the analysis
  • Tab delimited: tab delimited output - suitable for pasteing into a spreadsheet
  • Run status: status of analysis in progress
  • the navigation bar at the top allows you to move between adjacent distributions (< and > buttons) or to move between pages of multiple plots (<< and >> buttons)

Output
Likelihood
Posterior
Indices
Ranges
Range 68.3
Range 95.4
Range 99.7
Summary statistics
μ
σ
Median
Style
Date reporting
Round by
Reversed
Table
Whole range
Controls

Select what is to be reported

  • Likelihood: the unmodelled probability density function and ranges (for example simple calibration for radiocarbon)
  • Posterior: the modelled probability density function and ranges as modified by the prior information entered in the model

Select style of reporting

  • BC/AD or BCE/CE have no year zero, all others do
  • Define any rounding of dates for all but Gregorian fractional dates
  • Reversed: reports with earliest item at the bottom (stratigraphic order)

Select the ranges to be reported in the tables and plots

  • Wholerange: gives only earliest and latest dates
  • Controls: shows plot control elements in table
Apply changes
Title
Ranges
Distributions
Curve
Raw curve points
F14C
Delta14C
Grid
Reference
Convergence
Agreement
Outliers
Parameters
Verbs
Multiple
Normalise areas
Structure
Interpolation
Color outliers
Merge ranges
Individual
Gaussian
Text

Select what to show in the tables and plots; less obvious options are:

  • Raw curve points: shows interpolation (requires data to be included (analysis options)
  • F14C: plot against F14C rather than BP
  • Convergence: show section of MCMC sampling (required data to be included (analysis options)
  • Agreement: show indices on plot
  • Outliers: show outlier posterior/prior values on plot
  • Parameters: show parameters on plot
  • Normalise areas: equal areas for distributions
  • Structure: shows structure of model in multiple and depth plots
  • Interpolation: shows band of ranges in plots against x, y or z
  • Color outliers: use color range for outlier probabilities
  • Merge ranges: in multiplots, show just the start and end of a split range
  • Gaussian: shows radiocarbon concentration distribution
Apply changes
Ranges
Proportion place
AD first
Plots
Italics for posterior
B & W only
Brackets
3D Effects

Select style of plots and reporting

  • Proportion place: where the proportion is shown for each range
  • AD first: whether dates are reported like AD1066 or 1066AD
  • Italics for posterior: italic labels indicate posterior
  • B & W only: no colour used in plots
  • Brackets: simple brackets used for structure instead of boxes
  • 3D Effects: adds visual aids for mulpiple plot structure and correlation plots

Adjust aspects of plot. Taskbar allows you to:

redraw narrower wider smaller larger
line spacing text size
  • Title: title of plot
  • Zoom: absolute size of plot
  • PPP: plots per page (also affects size of distributions)
  • Labels: labels placed on axes
  • Centre/Span/Min/Range: allow axes scales to be altered or set to specific values
  • Major: major axis divisions and grid
  • Minor: minor axis divisions (requires Major to be set)

Options
Resolution
Calibration Curve
Default Yes No
Cubic Interpolation
Include raw curve
Use F14C space
Reporting
Use BC/AD not BP
Use +/- for BC/AD
Ranges
Whole (floruits)
Intercept method
68.3%
95.4%
99.7%
  • Resolution: bin size for probability distributions
  • Curve options
    • Cubic: interpolation between curve points (otherwise linear)
    • Include raw data: required if you want this in your plots
    • Use F14C space: calibration comparisons are made in F14C rather than BP
  • Whole (foruits): gives only one range (floruit if using probability method)
  • Intercept method: for 14C calibrations (otherwise probability method)
14C Calibration Curve
Atmospheric
Reservoir τ ±
Marine/mixed curve
Marine
Atmospheric %
Marine % ±
Delta_R ±

Specific atmospheric curves can be selected. See help on calibration curves.

An exponential reservoir time constant can be enetered where turnover is slow relative to the resolution.

Marine components can be entered in any proportion (select 100% for fully marine). You will need to set a ΔR offset for local effects. See help on calibration curves for links to database of values.

Add additional data plot to the top of multiple plots.

  • Clear: clears the data
  • New: add a new data plot
  • Edit: edit the data
  • δ18O: add GISP2 δ18O
  • Δ14C: add Δ14C from default curve

Context Sensitive Tips ON


Map plot
Min
Max
Increment
Normalise circles
Circle zoom
Color by
Split by
Multimaps
Columns
Rows
Increment
Proxy mapping
Proxy