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This is a generic function for screening units/rows based on data availability. See method documentation for more details:
Screen(x, ...)
An object of the same class as x
x
Object to be screened
arguments passed to or from other methods.
This function replaces the now-defunct checkData() from COINr < v1.0.
checkData()
Screen.data.frame()
Screen.coin()
Screen.purse()