Initial CRAN release.
xnew_data() generates a new data frame (in the form
of a tibble) for predictive purposes. By default all specified variables
vary across their range while all other variables are held constant at
their reference value. Types, classes, factor levels and time zones are
always preserved.
xnew_seq(), xnew_value(),
xobs_only() and xcast() are used within
xnew_data() to set the length of individual sequences,
override reference values, restrict combinations to those observed and
cast new values to the class of an existing column.
new_seq() and new_value() generate the
sequence and the reference value for an individual vector.
new_data() provides a string based interface to the
same functionality and is superseded by
xnew_data().