Plot the number of missings for each variableSource:
This is a visual analogue to
miss_var_summary. It draws a ggplot of the
number of missings in each variable, ordered to show which variables have
the most missing data. A default minimal theme is used, which can be
customised as normal for ggplot.
(optional) bare variable name, if you want to create a faceted plot.
logical shows the number of missings (default), but if set to TRUE, it will display the proportion of missings.