complements to miss_case/var_prop/pct

[njtierney]

Currently you can get the proportion and percent of cases with missings, and variables with missings using miss_case_prop and co:

library(naniar)
miss_case_prop(airquality)
#> [1] 0.2745098
miss_case_pct(airquality)
#> [1] 27.45098
miss_var_prop(airquality)
#> [1] 0.3333333
miss_var_pct(airquality)
#> [1] 33.33333

Created on 2018-04-28 by the reprex package (v0.2.0).

There should be "complete" data equivalents:

• complete_case_prop()
• complete_case_pct()
• complete_var_prop(
• complete_var_pct()