Function reference • pb210

Age-depth models Calculate ages from cumulative masses and lead-210 activities
`pb210_cic()` `pb210_crs()` `predict(<pb210_fit_cic>)` `predict(<pb210_fit_crs>)`	Apply the Constant Rate of Supply or Constant Initial Concentration model
`pb210_cic_monte_carlo()` `pb210_crs_monte_carlo()` `predict(<pb210_fit_cic_monte_carlo>)` `predict(<pb210_fit_crs_monte_carlo>)`	Run a Monte-Carlo simulation on a CRS or CIC fit
Lead-210 helpers Calculate the information required to fit an age-depth model
`pb210_cumulative_mass()`	Calculate cumulative mass
`pb210_excess()`	Calculate excess (unsupported) lead-210
`pb210_inventory()` `pb210_inventory_calculator()` `predict(<inventory_calculator>)`	Calculate cumulative lead-210 activity
`pb210_decay_constant()`	Calculate a decay constant
`pb210_bulk_density()` `pb210_bulk_density_estimate()` `pb210_slice_mass()` `pb210_porosity()`	Estimate dry density from water and organic content
`pb210_core_area()` `pb210_slice_volume()`	Calculate core area from an internal diameter
`pb210_error_from_activity()` `pb210_error_from_counts()` `pb210_activity_from_counts()` `pb210_counts_from_activity()`	Work with raw count data
Statistical helpers Fit exponential and loglinear models to estimate activities above and below measured values
`pb210_as_fit()` `pb210_fit_lazy()`	Coerce objects to exponential fits
`pb210_fit_exponential()` `pb210_fit_loglinear()` `pb210_fit_exponential_manual()` `pb210_fit_exponential_zero()` `pb210_fit_exponential_constant()` `predict(<exponential_manual>)` `coef(<exponential_manual>)` `predict(<lm_loglinear>)` `coef(<lm_loglinear>)`	Fit an exponential model
`max_finite()`	Max finite value
`pb210_sample_norm()`	Random samplers
`finite_head_prop()` `finite_tail_prop()` `finite_tail()` `finite_head()`	Subset generators
Example data Real lead-210 measurements on which to practice fitting age-depth models
`alta_lake_pb210`	Alta Lake Gravity Core Data
Core simulators Simulate a core with a known accumulation rate to test or practice fitting age-depth models
`pb210_simulate_accumulation()` `pb210_simulate_core()` `pb210_simulate_counting()`	Simulate sediment accumulation
`pb210_mass_accumulation_constant()` `pb210_mass_accumulation_rlnorm()`	Parameter generators for mass accumulation rates
`pb210_density_constant()`	Parameter generators for density values
`pb210_supply_constant()`	Parameter generators for lead-210 supply
`pb210_compressibility_constant()` `pb210_compressibility_none()`	Parameter generators for compressibility

Reference

Age-depth models

Lead-210 helpers

Statistical helpers

Example data

Core simulators

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