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The result is a plain data frame carrying a .cohort column, so it can be used as the list of units to visit. It is deliberately not a tbl_sample: the weights it carries are each cohort's own, the row set may hold a unit once per cohort that drew it, and whether the cohorts overlap at all is something the program does not know. Being a plain data frame is what stops it reaching as_svydesign() as though it were one sample.

Usage

# S3 method for class 'rotation_wave'
as.data.frame(x, ...)

Arguments

x

A rotation wave.

...

Not used.

Value

A data frame.