empty

Check if a data frame is empty. Empty if it's null or it has 0 rows
  or columns

internal

plyr is a set of tools that solves a common set of
        problems: you need to break a big problem down into manageable
        pieces, operate on each pieces and then put all the pieces back
        together.  For example, you might want to fit a model to each
        spatial location or time point in your study, summarise data by
        panels or collapse high-dimensional arrays to simpler summary
        statistics.

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empty: Check if a data frame is empty.

Description

Usage

Arguments