Remove cases with missing values.
listwise_delete(obj, vars)# S3 method for data.frame
listwise_delete(obj, vars = names(obj))
# S3 method for lm
listwise_delete(obj, vars = all.vars(formula(obj)))
For data.frames, the vars are checked for missing values. If one is found on any of
the variables, the entire row is removed (list-wise deletion). For linear models, the model is
refit after the underlying data have been processed.
The data.frame or lm object to process.
The variables to consider.