Applies a symbolically defined transformation to the
column of a data frame. Additionally, if a
sigma column is
present, those values are transformed according to Gaussian error
data frame with at least columns "name" (character) and "value" (numeric). Can optionally contain a column "sigma" (numeric).
character (the transformation) or named list of characters. In this case, the list names must be a subset of those contained in the "name" column.
The data frame with the transformed values and sigma uncertainties.