DesignOptions-class: DesignOptions S4 class
In RItools: Randomization Inference Tools

DesignOptions-class

R Documentation

DesignOptions S4 class

Description

Extends the ModelMatrixPlus class

Details

If the DesignOptions represents clusters of elements, as when it was created by aggregating another DesignOptions or ModelMatrixPlus object, then its Covariates and NotMissing slots are populated with (weighted) averages, not totals. E.g., NotMissing columns consist of weighted averages of element-wise non-missingness indicators over clusters, with weights given by (the element-level precursor to) the UnitWeights vector. As otherwise, columns of the NotMissing matrix represent terms from a model formula, rather than columns the terms may have expanded to.

If present, the null stratification (all units in same stratum) in indicated by the corresponding column of the StrataFrame slot bearing the name ‘--’.