This allows specifying and retrieving default values for newly created isotopia objects.

set_iso_opts(default_ab_notation = c("raw", "percent"),
default_ff_notation = c("alpha", "eps", "permil", "ppm"),
default_delta_notation = c("raw", "permil", "ppm"),
default_intensity_unit = "", default_major = "",
default_minor = "", exact_mass_balance = FALSE, standards = c())

get_iso_opts(opts)

## Arguments

default_ab_notation default notation of abundance objects, see switch_notation for details default notation of fractionation factors default notation of delta values default unit for intensity values default major isotope on all isotope objects NOT IMPLEMENTED YET! If enabled, mass balance calculations with delta values (i.e. mass_balance(delta, delta, delta... or delta() + delta()) will always be performed exact by converting to natural abundances first and making the addition in abundance space (will be converted back to delta value afterwards). This is only possible if the ref_ratio in the delta values is set and will lead to an error if attempted without the reference ratios set. If disabled, mass balance calculations with delta values (delta() + delta()) will be performed in delta space (which is not exact but the discrepancy is negligible unless the minor isotopes in an isotope system make up a significant portion) see register_standard for details isotope ratio objects to register as standards minor default minor isotope on all isotope objects

## Details

get_iso_opts allows retrieval of all or individual isotopia options. Returns a single value if only one option is requested, a named list if multiple

## Note

Default options are the following and are set during package loading together with the default standards  set_iso_opts( default_ab_notation = "raw", default_ff_notation = "alpha", default_delta_notation = "permil", default_intensity_unit = "", default_major = "", default_minor = "", exact_mass_balance = FALSE ) 

Other options: register_standard
get_iso_opts("standards") # get a table of all standards
#>            ^