(Internal) A helper function to turn formulas into treatment and blocking variables

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Description

Given a function and any of the arguments normally passed to model.frame, this function will return a data.frame with two columns: a treatment indicator and a blocking factor.

Usage

1

Arguments

x

A formula

...

Arguments to be passed to model.frame (e.g. data)

Value

data.frame containing two columns: Z is a treatment indicator, B is a blocking factor

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