Numeric vector with power and shift parameter in that order.
Arguments
value
Response variable in the data, e.g. "effect" column
fac
Factor indicating groups of replicates, e.g.
interaction(d1,d2)
shift
Whether to use 2-parameter Box-Cox transformation. Input may be
TRUE/FALSE or a numeric value indicating the shift parameter to use.
If FALSE, shift parameter is set to zero.