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 |

major |
- name of the major isotope in the isotope system [optional] |

notation |
- 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. |

ctop |
- name of the compound representing the top isotope ratio [optional] |

cbot |
- 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.

## See also

Other isotope data types: `abundance`

,
`delta`

, `intensity`

,
`ratio`