ref="../pkgdown.css" rel="stylesheet"><script src="../pkgdown.js"></script><link href="../extra.css" rel="stylesheet"><script src="../extra.js"></script><meta property="og:title" content="Keyed object — keyed-df"><meta property="og:description" content="Utility functions for keyed objects which are implemented with class
keyed_df. Keyed object should be a data frame which inherits from
keyed_df and contains a data frame of keys in attribute 'keys'."><!-- mathjax --><script src="https://cdnjs.cloudflare.co