fdt results which contains the interval
classes description and format it according to a pattern wich is a regular
expression, the same as used by sprintf. It is mainly for
internal use of the fdth package.make.fdt.format.classes(x, right, pattern)fdt object.fmt in sprintf.make.fdt.format.classes returns a data.frame which
contains the formatted interval class values.fdt results (object)
which contains the interval classes description and format it according to a
pattern wich is a regular expression, the same as used by sprintf.
It is called by the generic function summary and is mainly for
internal use of the fdth package.sprintf and gsub provided by base package.