dgrtwo/broom — pull request #13 by bdemeshev (2014-10-18 11:47:59+00:00)
Title: add some info about NAs to glance.data.frame

Two more numbers for glance.data.frame to judge about NAs:
`full_obs` --- the number of complete observations, number of rows without NAs
`na_fraction` --- the total fraction of NAs in data.frame