z_normalise: Normalise z values within a gtable object
Description
The z values within a gtable object can be any numeric
values. This function will change them to integers
(starting from 1), preserving the original order.
Usage
z_normalise(x, i = 1)
Arguments
x
A gtable object
i
The z value to start counting up from (default
is 1)
Details
Ties are handled by the "first" method: the first
occurrence of a value wins.