Generate a fractionation factor object. Can be initialized in alpha and epsilon notation. Fractionation factors can be easily converted from values in one notation to values in another notation by using switch_notation.

fractionation_factor(..., major = get_iso_opts("default_major"),
notation = get_iso_opts("default_ff_notation"), ctop = "",
cbot = "", single_as_df = FALSE)

ff(..., major = get_iso_opts("default_major"),
notation = get_iso_opts("default_ff_notation"), ctop = "",
cbot = "", single_as_df = FALSE)

## Arguments

... - numeric vectors (can be named) to turn into fractionation factors - name of the major isotope in the isotope system [optional] - which notation the value is in, "alpha" (alpha value), "eps" (epsilon value), "permil" (epsilon * 1000) are currently implemented for fractionation_factor values. See switch_notation on details how to convert between notations. - name of the compound representing the top isotope ratio [optional] - name of the compound representing the bottom isotope ratio [optional]

## Details

See isotopia for general information on initializing and converting to other isotope data objects. The ff function is a shorthand for fractionation_factor but otherwise identical.

Other isotope data types: abundance, delta, intensity, ratio