lexical: Finds the lowest feasible tolerance in each group, holding...
In ebenmichael/ents: Maximum Entropy Synthetic Controls

Finds the lowest feasible tolerance in each group, holding the previous groups fixed

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lexical(outcomes, metadata, grp_order, outcome_col, trt_unit = 1, by = 0.1,
  maxep = 1, cols = list(unit = "unit", time = "time", outcome = "outcome",
  treated = "treated"), lowerep = 0)

`outcomes`	Tidy dataframe with the outcomes and meta data
`metadata`	Dataframe of metadata
`grp_order`	Lexical ordering of groups
`outcome_col`	Column name which identifies outcomes, if NULL then assume only one outcome
`trt_unit`	Unit that is treated (target for regression), default: 0
`by`	Step size for tolerances to dry, default: 0.1
`maxep`	Maximum tolerance to consider
`cols`	Column names corresponding to the units, time variable, outcome, and treated indicator