drop_fixed_cols: Return names of columns having several unique values
Description
Return names of columns having several unique values
Usage
drop_fixed_cols(xpdb, .problem, cols, quiet)
Arguments
xpdb
An xpose database object.
.problem
The $problem number to be used.
cols
A vector of column names to be checked.
quiet
Should messages be displayed to the console.
Value
A subset of `col` for which more than one single
value was found in the data.