ttB = standardizeMissing (ttA, indicator) replaces every value matching indicator with the missing value of its own type, so that ismissing and rmmissing will afterwards treat it as missing. Each indicator applies only to the variables of its own kind, as table.standardizeMissing describes: numbers to floating point variables, text to text and categorical variables, and duration and datetime indicators to variables of their own type.

'DataVariables' restricts it to the variables named. The row times are not a data variable and are never rewritten, so the time step is unchanged.

See also: timetable.ismissing, timetable.rmmissing, timetable

Source Code: timetable