Target number of bins, which may not be reached if the
number of unique values is smaller than the specified value.
max.breaks
Maximum number of quantiles; must be at least as
large as target.bins.
verbose
Indicates verbose output.
Details
Because the number of unique values may be smaller than target.bins,
the function gradually increases the number of quantiles up to max.breaks
or until the target.bins number of bins is reached.