R: Builds Chronologies from Oxygen Isotope Profiles in Shells

# Builds Chronologies from Oxygen Isotope Profiles in Shells

## Documentation for package ‘ShellChron’ version 0.4.0

- DESCRIPTION file
- Package NEWS
- Package README

## Help Pages

age_corr | Function that corrects chronologies for sudden jumps in time
cumdy | Function to detect year transitions and calculate cumulative age of model results
cumulative_day | Function to detect year transitions and calculate cumulative age of model results
d18O_model | Function to convert SST data to d18O
data_import | Function to import d18O data and process yearmarkers and calculation windows
export_results | Function to merge and export the results of the ShellChron model
growth_model | Function that models a d18O curve through SST and GR sinusoids
growth_rate_curve | Function that creates a skewed sinusoidal growth rate (GR) curve from a list of parameters
mc_err_form | Function that propagates measurement uncertainty through model results
mc_err_orth | Function that propagates measurement uncertainty through model results
mc_err_proj | Function that propagates measurement uncertainty through model results
peakid | Function that identifies peaks in a dataset
run_model | Function that optimizes sinusoid parameters to fit d18O data
sd_wt | Function to calculate weighted standard deviation
sinreg | Function that carries out a sinusoidal regression
temperature_curve | Function that creates a sinusoidal Sea Surface Temperature (SST) curve from a list of parameters
Virtual_shell | Virtual input data for ShellChron
wrap_function | Full ShellChron workflow wrapped in a single function