create_cells: Create data frame with all distinct cells, and their sample...
In ebenmichael/multical: Multilevel calibration weighting for surveys

Create data frame with all distinct cells, and their sample and target counts

1	create_cells(formula, target_count, data)

`formula`	Formula of the form `sample_count ~ covariates`, where `sample_count` is whether or not an individual responded (with individual-level data) or the number of respondents in the cell (with cell-level data) and `covariates` are the covariates to calibrate on
`target_count`	Name of column with indicators for whether an individual is in the target population (with individual-level data) or the target counts for each cell (with cell-level data)
`data`	Dataframe with covariate information, sample and target counts